20. Many people think every minute must be made full use _____ English.

　 A. of studying 　　　 B. to study 　　 C. of being studied 　　　 D. of to study

19.--- I haven't heard from Henry for a long time.

　　 --- What do you suppose _____ to him?

　 A. was happening 　　 B. to happen 　　C. has happened 　　　　 D. had happened

18. Our English teacher often encourage us _____ English every day.

　 A. practising 　　 　　　 B. practise 　　　 　 C. to practise 　　　　 D. practised

17. It's time that we _____ to save and protect our water resources.

　 A. take measures 　 B. took measures 　　C. will take measure 　　 D. will take measures

16. The computer system ____ suddenly while he was searching for information on the Internet.

　 A .broke out 　　　　　　 B. broke down 　　 C. broke up 　　　 　 D. broke in

15. Then came the disappointing news _____ Brazil was beaten by German in the 2010 World Cup, ______ was bound to cast down the Brazilian fans.

　 A. that; what　　　 B. which; which　　 C. which; what　　　 D. that; which

14. In the dark forests ____ , some large enough to hold several English towns.

　 A. stand many lakes 　 B. lie many lakes 　C. many lakes lie 　 D. many lakes stand