问题

I failed in the examination last term and only then ____ the importance of studies.

A:I realized
B:I had realized
C:had I realized
D:did I realize

正确答案是：

同类题型

The children ____ very quiet；I wonder what they ____ up to

What’s Jack up to in the shoe shop He’s there for ages.—It’s ______ that he hasn’t decided which pair to buy.

30. The sweater my sister knitted for me ______ twice the size it should have been. It had to be kept for later use.

This kind of fruit____________

Did your brother know–No，I didn’t tell him aboutit．