一、选择填空

1. —If you buy another pet dog, you are just laying out money and you'll feel sorry for it soon.
—Maybe I should ________ that wild idea.
A. afford B. drop C. choose D. throw

B

2. As the saying goes, “Always taking out of the meal-tub(餐盘) and never putting in, soon comes to the ________.”
A. cover B. top C. bottom D. surface

C

3. —We have got another problem, guys. Our food and water are all running ________.
—Oh! How can we survive in this desert?
A. weak B. low C. wild D. poor

B

4. —Why do so many people like riding shared bikes?
—One of the advantages is that it can ________ the air pollution.
A. cut off B. cut out C. cut up D. cut down

D

5. —Could you tell me ________?
—Well, we should ride bikes or take the subway instead of driving.
A. what your idea for reducing air pollution is
B. what is the solution to save sea animals
C. how can we do to save the environment
D. what we did in order to protect the city's air system

A

二、用方框中所给的单词或短语完成对话(提示：有两个多余选项)
　　　　
Tony: Hey, Mark, maybe we ________ (1) go swimming in the river later this afternoon.
Mark: I don't think I want to go, Tony.
Tony: Why?
Mark: I was there last weekend and the river was really dirty. Even the ________ (2) of the river was full of rubbish, and there were no more fish for fishermen to catch.
Tony: No way! It ________ (3) be so clean. In fact, it has always been the nicest river in this town.
Mark: Not any more. I think people are ________ (4) litter into the river. Factories are also putting waste into the river.
Tony: That's terrible! We should write to the government. They should close down the factories.
Mark: Good idea! But I think everyone in this town should help to ________ (5) the river, too. Everyone should play a part, not just the government.

(1)could (2)bottom (3)used to
(4)throwing (5)clean up