(A)单项填空 从每小题A、B、C.三个选项中,选出能填入空白处的最佳答案。（15分）
( )31. Don’t worry, Sir. I’m sure I can run _______ to catch up with them .
A. fast enough B. enough quickly C. enough slowly
( )32.When you have some difficult math problems, you can __ your math teacher.
A. turn to B. to ask C. ask for
( )33. Jenny’s teeth are not good, because she ____.
A. has a sweet tooth B. has sweet tooth C. have a sweet tooth
( )34. —I lost my MP3 on my way to school this morning.
—____ You must be careful next time.
A. Take care! B. Excuse me! C. It’s a great pity!
