九（上）Unit 3 Topic 3 Section D 课时练
一、单项选择:
( )1.—This physics problem is too difficult. Can you show me _____, Wang Li?
—Sure.
A.what to work it out B.what to work out it
C.how to work it out D.how to work out it
( )2.It is important _____ the piano well.
A.of him to play B.for him to play
C.of him playing D.for him to playing
( )3.—Sorry, I can’t follow you. I beg your pardon?
—_____
A.You are welcome. B.That’s all right.
C.Not at all. D.No problem.
