问题

I saw him in the library yesterday. He ________ a book at that moment.
A:reads
B:is reading
C:was reading
D:will read
B:is reading
C:was reading
D:will read
正确答案是:
同类题型
My friend Tom _______me __________ for an hour yesterday.
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When did you get to know the information? — ____ I ____ yesterday.