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

This is __ song I’ve told you about . Isn’t it __ beautiful one?

does Mary usually go to the bubby club?–Once a week.[ ]

We watch TV _______Sundays. [ ]

Do you know the girl?—Yes, ______ name is Linda.

He has ______ little education that he can’t teach _______ little children.