22、Whoever leaves the lab last, _____ all the lights are turned off.

A. make sure           B. make sure of            C. be sure               D. be sure of

21、People _____ much more by their gestures than by their words.

A. give in              B. give out             C. give up              D. gave away

20、He was born in Beijing and _____ by his grandma in a seaside village.

A. brought in            B. brought out                C. brought up               D. brought back

19、— We’ll go to climb the mountain this weekend. Would you like to join us?

— _____

A. That sounds fine to me.                                B. It’s really hard work.

C. What do I need to prepare?                           D. What may I expect?

18、It’s been years since I _____ myself so much.

A. enjoy           B. enjoyed             C. have enjoyed                  D. had enjoyed

17、One third of the class _____ agreed to be volunteers to help the aged this vocation.

A. are             B. is               C. has            D. have

16、He then moved to London, _____ he became famous.

A. which           B. when           C. where             D. why

15、Strong sandstorms are often _____ you cannot see the sun.

A. so thick that         B. such thick that          C. thick in order that          D. thick such that

14、Mencius believed that the reason why man _____ the animals is that man is good.

A. is similar to           B. is different from          C. are clever than             D. are kind to

13、The dam will generate electricity _____ about 40 million tons of coal without causing so much air pollution.

A. equal          B. be equal           C. equal to           D. be equal to