22. One year has 　　　　　before I realize the importance of study.

21. 　　　　　such a difficult problem, I really didn’t know what to do?

20. The teacher felt helpless when he found his student had 　　　　　love stories for long.

19. When he was seeing the 　　　　　film, he was very 　　　　　.

18. Four 　　　　　five students in the class don’t agree with him.

17. - 　　　　I go to the seaside for my holiday?

-Well, I’m afraid it’ll be too crowed if you spend your holiday by the seaside at this time of year.

16. Nuclear science should be developed to benefit the people 　　　　　to harm them.

15.　-It is not right for him to give up his present job. -Well, I 　　　　　to change his mind but failed.

14.　Children are naturally 　　　　　about everything around them.

13.　The word “moon” is an ancient word 　　　　　“month”.