A Lucky CoinA 1943 US penny made at the Denver Mint（铸币厂）has sold for $1.7million. That single coin is thought to be the （31）_____ copper （铜） coin made in Denver that year.Pennies were made of steel in 1943 because copper was in（32） _____ supply for use in equipment to help （33） _____ World War II. That was the only year that Lincoln pennies were not （34） _____ of copper.A （35） _____ coin cllector was eager to pay the buge sum fot the coin because it was one of a kind. And that collector （36） _____ had a 1943 copper penny from each of the other two US Mints.You might be suprised to （37） _____ what some of your own coins are （38） _____. The more scarce any collectible （可收藏的） item is, the higher the （39） _____ tends to be. It is possible that you might have a small （40） _____ sitting in your pocket right now! A. wealthyB. shortC. learnD. consistedE. onlyF. alreadyG. priceH. madeI. largeJ. fightK. fortuneL. worth

Can Dogs See Colors?Man's best friend is colorblind (色盲). Fortunately (fortunate), his （41）_____(survive) does not depend upon the ability to see colors. The （42）_____ (sharp) of his sense of smell makes up for his（43） _____ (fail) to see colors. It helps him to tell between things.（44）_____ (study) support the conclusion that dogs live in a （45）_____ (color) world. The testing done primarily （46）_____ (focus) on the dogs' responses to colors for food. Dogs could not tell the （47）_____ (differ)between one color signal for food, and other colors that were not for food.Most animals' lack of ability to see colors can be （48）_____ (easy) understood. Many colorblind animals hunt for food in the dark of night. Their other senses have highly （49）_____(develop). Thus their lack of color vision does not affect them.Other animals with color vision are （50）_____ (monkey) and apes(猿). Both can be trained to open a colored door, behind which is food.

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Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.People need to explore more about the meaning of a vacation.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.We begin to feel the benefits of a vacation after we start to pack our suitcases.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.People expect that a vacation ahead will put an end to what is happening now.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.Companies do not pay their employees when they are on vacation.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.A vacation may enable us to look at old things in a new way.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.On vacation, we don't try new sports.

Why We Need VacationsThere's more to a vacation than can be described in travel books. We certainly need breaks from work. But there is even more to be said for a get-away break, leaving all daily work behind and living a different life for a short time.The benefits of taking a vacation start long before the suitcases are packed. A vacation is something to look forward to. It gives us the sense that whatever is happening at the moment will end soon.Companies sometimes use away-breaks to restore（恢复）motivation and team relationships. If you're able to switch off and leave your daily work behind, when you come back, you often view old situations with fresh eyes and see them in a new way.People don't disappear while no vacation. We're still thinking and feeling the whole time we're away. What really makes the difference is not simply getting away from the daily work; it's being able to do something else instead. We might speak to people we wouldn't normally meet, try sports we'd not do otherwise, and discover interests we never knew we had.Vacations also allow us to focus on the present in a way that's hard to do at home. When you're in a new environment for a short time, your attention tends to be on what's happening right now and in the next few days. Being "in the moment" is in itself one of the keys to getting relaxed, and this happens more naturally on vacation.Every vacation is an adventure full of potential discoveries. Perhaps more than anything else, vacations enable us to raise our eyes from familiar paths so that we can look around and see that there's a world out there.We may find out our hidden interests during vacations.