We must do whatever we can _____ the river _____ any more.
| A．to keep; polluted | B．to prevent; being polluted |
| C．keep; polluted | D．prevent; being polluted |
25．He left for lunch________ the clock_________ twelve．
| A．while; hit | B．immediately; struck | C．right away; beat | D．at once; knocked |
24. The boy the teachers considered _____ was caught ______ in the exam, which surprised us very much.
| A．to be the best, cheating | B．as the best student, to cheat |
| C．being the best, cheating | D．as a good student, to cheat |
22．If you keep practising your son in football, he________ to make a famous player．
| A．wants | B．hopes | C．promises | D．Wishes |
21. —What did you think of _____ president?
—I didn’t care for him at first, but after ______ time I got to like him.
| A．the, a | B．/, the | C．the, the | D．/, a |
We believe _____ you have devoted yourself _____sure to come true.
| A．that; is; to | B．all that; to; be | C．that all; are | D．what; to; is |