28. His mother doesn’t ______ of her going to study in the United States alone.

A. allow B. agree C. prove D. approve

29. — Hello, Jim! May I ask you a question?

— ________.

A. No, thanks B. Right

C. Never mind D. Certainly

30. I _______ any job I like since I came to this city.

A. haven’t done B. don’t do C. wouldn’t do D. didn’t do

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