It’s very boring to sit on the plane with nothing to read ________nobody to talk with.

A.and B.for C.but D.so

________ she grew older, she became braver and wasn’t afraid of darkness any more.

A.Unless B.As C.If D.Though

The story is________ interesting ________ everybody likes it very much.

A.very ; that B.so; that C.such; that D.such; because

Mr. Black walked around and offered help ________we were doing an experiment.

A.while B.when C.unless D.before

my brother my sister likes pop music. They often listen to it.

A.Both, and B.Neither, nor C.Either, or D.Not only, but also

Our English teacher is very________ not only in all his own work, but with every one of us.

A.active B.outgoing C.strict D.handsome

Although the young man has failed many times, he is never ________ with himself.

A.satisfied B.disappointed C.moved D.pleased

In such ________weather, the flowers have to be watered more often in order to keep alive.

A.wet B.dry C.gentle D.pretty

Li Lei’s mother was ________ him because he went out to play in the rain.

A.angry with B.pleased with C.sorry for D.kind to

“When it comes to Earth, there’s no time to waste,” the Earth Day Network says. And that is true. 1. (protect) our environment is very important. World Earth Day was created in 1970 to raise people’s e2. awareness.3. April 22, people around the world celebrate Earth Day.

Every year there is a special theme. The theme was “Trees for Earth” in 2016. Their goal is to 4. 7.8 billion trees by 2020.

That’s a big goal, and you might wonder5. trees are so important. Well for one, they can help stop climate change. Carbon dioxide (二氧化碳) is a chemical in our atmosphere, but humans make too much of it. Each person makes about 2.3 tons a year, which is b6. for the environment.

Well guess what! Trees take in carbon dioxide and improve air quality. Planting new trees is important because people cut down countless t7..

According to Time, the total number of trees in the world has been almost cut in half since human civilization (文明) 8. (begin). So we need to plant more to replenish (补充) the ones we’ve lost. One tree can take in 48 pounds (21.8kg) of carbon dioxide per year. And it’s still one of the9. (cheap) and best ways to get rid of carbon dioxide.

But don’t forget that you can also help the environment by cutting down on how much energy or w10. you use every day. Every little bit helps!