问题

What were you and your cousin doing at this time yesterday— He was reading a magazine ________ I was writing an e-mail.

A:must
B:may
C:can
D:need;

正确答案是：

同类题型

The explosion sent us ______in alldirections.

en Jack arrived, he learned Mary ____for almost an hour.

There is no reason why you shouldn’t tell the headmaster _________ that you are resigning because he has arranged your post

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Helen __________Gray ______ she left college.