10. The weather is so cold. Don’t keep the door_______.

　 A. open　　　　　 B. opening　　　 C. closed　　　　　 D. closing

9. There are several chemical factories _______ waste water into the river.

　 A. pouring　　　　　　 B. pour　　　　 C. to pour　　　 D. poured

8. Air pollution causes ______ problems and even cancer.

　 A. breath　　　　 B. breathy　　　 C. breathing 　　　 D. breathed

7. A great deal of money has been contributed by many warm-hearted people to_______homeless people.

　 A. help　　　　　　　 B. helped　　　　　 C. helping　　　 D. helpful

6. Our English teacher is quite strict _______us and _____ his work.

　 A. to , in　　　　　　 B. with, /　　　　　 C. with, in　　 D. to, in

5. Thanks ______ the Great Green Wall， a lot of rich farm land is saved.

　 A. to　　　　　　 B. for　　　　　 C. at　　　　　　　 D.　 /

4. She always _______ her hair long.

　 A. puts on　　　　　　 B. dresses　　　 C. wore　　　　 D. wears

3. Parents　 couldn’t _______ their children good education then.

　 A. offer　　　　　 B. provide　　　 C. to afford　　　　 D. affording

2. Have you spent the whole holiday ______ there?

　 A. in work　　　　　　 B. to work　　　 C. worked　　　 D. working

1. We feel sorry ______child laborer in the old days.

　 A. to　　　　　　 B. for　　　　　 C. at　　　　　　　 D.about