631. When I got to the school, I found that I ____my schoolbag at home.

A. left　　 B. forgot　　 C. had forgotten　　 D. had left

630. In the accident, ___ 100 people ___.\

A. as much as, were killed　　　 B. as many as, were died

C. as many as, died　　　　　　 D. as much as , died

629. Don’t give ____, and try it -___ time.

A. out , the second　　 B. up, a second　　 C. up, the second　　 D. off, the second

628. In China, one ____ five of the population ____ farmers.

A. of, is　　 b. in ,are　　 C. out of, are　　 D. out of , is

627. As soon as they arrived, they set ____ to set ___ the tent.(帐棚)

A. off, up　　 B. about, up　　 C. out, up　　 D. out , about

626. The population of China___more than one fifth of the total population in the word.

A. in made up of　　 B. makes up　　 c. is made of　　 D. makes of

625. Any boy ___ wants to swim can go with me.

A. he　　　 b. that　　 C. who　　 D. whom

624. It is a _____ that you missed such a wonderful concert.

A. shame　　 B. pity　 C. regret　　 D. mistake

623. The thieves ran ____ when the alarm went____.

A. away, off　　 B. up, off　　 C. away, down　　 D. to, away

622. The classroom must ______ clean and tidy.

A. keep　　 B. is　　 C. be keeping　　 D. be kept