问题

Are you sure you have to ? It’s been very late— I don’t know _____ I can do it if not now

A:where
B:why
C:when
D:how

正确答案是：

同类题型

The blue pen is mine. ________ this dictionary—It’s hers.

You will easily know ________ video recorders are the same.

For miles around me there was nothing but an island, without a single plant or tree ______

下列各句中，没有语病的一句是

I got the job I _______ forThe boss picked me out of 30 applicants