问题

I was giving a talk to a large group of people, the same talk I _______ to half a dozen other groups.
A:was giving
B:am giving
C:had given
D:have given
B:am giving
C:had given
D:have given
正确答案是:
同类题型
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ou know Anna’s telephone number——____ As a matter of fact, I don’t knowany Anna, either
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