21.He didn't make____ clear when and where the meeting would be held.

A. this B. that C. it D. these

22.If Newton lived today，he would be surprise by what ____ in science and technology.

A. had discovered B. had been discovered C. has discovered D. has been discovered

23.It is generally considered unwise to give a child ________ he or she wants.

A. however B. whatever C. whichever D. whenever

24. Eric received training in computer for one year，______ he found a job in a big company.

A. after that B. after which C. after it D. after this

25. Of the two sisters，Betty is one，and she is also the one who loves to be quiet.

A.a younger B.a youngest C.the younger D.the youngest

26. It's quite me why such things have been allowed to happen.

A.for B.behind C.against D.beyond

27. and happy，Tony stood up and accepted and prize.

A. Surprising B. Surprised C. Being surprised D. To be surprising

28. Send my regards to your lovely wife when you _____ home.

A. wrote B. will write C. have written D. write

29. Energy drinks are not allowed _____ in Australia but are brought in from New Zealand.

A. to make B. to be made C. to have been made D. to be making

30.Eugene's never willing to alter any of his opinions. It’s no use _____ with him.

A. to argue B. argued C. arguing D. having argued