问题

I ___________ frustrated when I wasn’t sure of the correct answer.[ ]

A: may be
B: used to
C: used to be
D: use to be

正确答案是：

标签： frustrated , used

同类题型

He has ________ all of the money and no one would like to help him.

_____ hat is Mrs Li’s. It’s _____ old one.

I have tried as as possible in the P.E. test.

This math problem is _________ thatone.[ ]

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