While you're in a lift, waiting to reach your floor, do you ever wonder who came up with the idea? Probably not. We just expect to have safe lifts in buildings.Lifts existed as far back as ancient Rome. But the ancient "lifts" weren't closed cars. They were simple platforms. They were typically used to raise up water for farming or lift heavy building materials such as stones. These lifts were powered by animals, people or even water wheels.The first modem passenger lift was built for King Louis XV in 1743. The Kings lift was installed（安装）on the outside of his palace. It went from the first to the second floor. The King entered it from his balcony, and then men raised and lowered the lift through the use of ropes and wheels.Lifts became more common in the mid-1800s during the Industrial Revolution when they transported goods in factories and mines. These lifts were often based on a hydraulic（液压的）system. However, this type of lifts was impractical for tall buildings, although it became popular because it could operate with the public water system.Another lift design (and the one found most often today in passenger lifts) uses a cable system, in which ropes raise and lower the car by means of a wheel and gear（齿轮）system.These types of lifts are easier to control and buildings that have them do not need the extra room required by hydraulic systems. By the 1850s, these types of lifts had been powered by water pressure or steam.The first modern passenger lift was_____.

While you're in a lift, waiting to reach your floor, do you ever wonder who came up with the idea? Probably not. We just expect to have safe lifts in buildings.Lifts existed as far back as ancient Rome. But the ancient "lifts" weren't closed cars. They were simple platforms. They were typically used to raise up water for farming or lift heavy building materials such as stones. These lifts were powered by animals, people or even water wheels.The first modem passenger lift was built for King Louis XV in 1743. The Kings lift was installed（安装）on the outside of his palace. It went from the first to the second floor. The King entered it from his balcony, and then men raised and lowered the lift through the use of ropes and wheels.Lifts became more common in the mid-1800s during the Industrial Revolution when they transported goods in factories and mines. These lifts were often based on a hydraulic（液压的）system. However, this type of lifts was impractical for tall buildings, although it became popular because it could operate with the public water system.Another lift design (and the one found most often today in passenger lifts) uses a cable system, in which ropes raise and lower the car by means of a wheel and gear（齿轮）system.These types of lifts are easier to control and buildings that have them do not need the extra room required by hydraulic systems. By the 1850s, these types of lifts had been powered by water pressure or steam.During the Industrial Revolution, lifts were_____.

While you're in a lift, waiting to reach your floor, do you ever wonder who came up with the idea? Probably not. We just expect to have safe lifts in buildings.Lifts existed as far back as ancient Rome. But the ancient "lifts" weren't closed cars. They were simple platforms. They were typically used to raise up water for farming or lift heavy building materials such as stones. These lifts were powered by animals, people or even water wheels.The first modem passenger lift was built for King Louis XV in 1743. The Kings lift was installed（安装）on the outside of his palace. It went from the first to the second floor. The King entered it from his balcony, and then men raised and lowered the lift through the use of ropes and wheels.Lifts became more common in the mid-1800s during the Industrial Revolution when they transported goods in factories and mines. These lifts were often based on a hydraulic（液压的）system. However, this type of lifts was impractical for tall buildings, although it became popular because it could operate with the public water system.Another lift design (and the one found most often today in passenger lifts) uses a cable system, in which ropes raise and lower the car by means of a wheel and gear（齿轮）system.These types of lifts are easier to control and buildings that have them do not need the extra room required by hydraulic systems. By the 1850s, these types of lifts had been powered by water pressure or steam.The lift based on a cable system_____.

While you're in a lift, waiting to reach your floor, do you ever wonder who came up with the idea? Probably not. We just expect to have safe lifts in buildings.Lifts existed as far back as ancient Rome. But the ancient "lifts" weren't closed cars. They were simple platforms. They were typically used to raise up water for farming or lift heavy building materials such as stones. These lifts were powered by animals, people or even water wheels.The first modem passenger lift was built for King Louis XV in 1743. The Kings lift was installed（安装）on the outside of his palace. It went from the first to the second floor. The King entered it from his balcony, and then men raised and lowered the lift through the use of ropes and wheels.Lifts became more common in the mid-1800s during the Industrial Revolution when they transported goods in factories and mines. These lifts were often based on a hydraulic（液压的）system. However, this type of lifts was impractical for tall buildings, although it became popular because it could operate with the public water system.Another lift design (and the one found most often today in passenger lifts) uses a cable system, in which ropes raise and lower the car by means of a wheel and gear（齿轮）system.These types of lifts are easier to control and buildings that have them do not need the extra room required by hydraulic systems. By the 1850s, these types of lifts had been powered by water pressure or steam.Which of the following is the best title for the text?

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.Paragraph①_____.

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.Paragraph②_____.

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.Paragraph③_____.

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.Paragraph④_____.

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.Paragraph⑤_____.

Summer Blues①We students all have summer blues. It's that moment when we haven't left the house for day's and the Internet has become our closest friend. This usually takes place in the heat of summer, when we forget there's a world outside of our rooms. It's usually our darkest hours, which is difficult to get out of, but not impossible.②Getting a summer job can help provide structure for your life. Without school schedule, it's difficult to try to get out of bed. In fact, we've been training ourselves for most of summer to sleep in until noon. But if you commit yourself to a job, then it can act as a reason to get up in the morning.③Another way to avoid the summer blues is by living a healthier lifestyle. Join a gym. Start shopping at your local market. Keep your room clean. Or maybe pick up a new and become a master at it. A little change in your life can have a significant effect in the long run.④The best way to avoid getting in a bad state is by packing your summer full of camps. With a new adventure waiting around the comer every week, how will an individual not want to wake up? You can attend two or three camps every year. You will find that you've met some of your closest friends from summer camps.⑤Sometimes, however, people do not realize they have suffered from the summer blues. They stay locked inside their houses for hours. If you know people like this, then call them up. Take them out for dinner. Catch a movie with them. Do not let your friends come down with a strong case of the summer blues.In summer, students usually stay at home_____.