Air pollution has become____than ever before. We must do something to stop it.

Now smart phones ________ in many ways in our daily life.

Passage ThreeEating in space is different from eating on earth. The food that astronauts carry with them does not look like the food you eat. Some food is carried in closed bags. It is cooked and frozen before the astronauts get it. All the water is removed from the food. In the spaceship the astronaut puts the water back. He "shoots" hot or cold water into the food bag with a special gun. He eats the food through a small hole in the bag.Other foods come in bite sizes. The astronaut puts a whole piece in his mouth at once. There will be no crumbs. Crumbs would float around the spaceship and get in the way. Meat and cake often come in bite-sized pieces. Astronauts can't drink water from open cups. The water would float in drops in the air. The water is put in the special gun. The astronaut shoots the water into his mouth. Eating in space is not easy. Astronauts must learn to eat this way.The main idea of the whole story is that_____.

You ought to know better than ____ yourself in unnecessary expense.

By ____, the national anthem is played at the beginning of a concert and at the end of a film.

What ______ next will be discussed at today's meeting.

Passage FourWhat's the best way to protect a tender, green seedling from the hungry stomach of deer? .Give the seedling bad breath!The same chemical that gives people bad breath after they have eaten garlic can save small trees from being eaten by animals.А kіnd оf сhеmісаl ѕеlеnіum（硒）, whісh іѕ аlѕо fоund іn gаrlіс, іѕ рlаntеd іn thе ѕоіl near a young tree. The tree's roots absorb the selenium which is then carried to the leaves.From there the selenium is used to form a chemical called dimethyl selenide（乙烷硒化物）—the same chemical made in the human mouth after eating garlic. As deer wander around looking for food, they smell the seedlings leaves and leave the plants alone.The selenium is important. Why? Because each year deer eat millions of dollars' worth of trees farm seedlings.So far, selenium has been tested only on Douglas fir（枞树）seedlings, but researchers think they could protect fruit trees and garden plants, too.Up till the time the news was announced, this kind of chemical was used_____.

Young ___ he is, he knows what is the right thing to do.

The ski resorts are usually crowded. There are many people _____ skiing.

—Its six oclock and your father is still at the office.—I know, who else would _______ he does?