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问题

They ___________ for two hours

A:is working
B:worked
C:have been working
D:had worked
正确答案是:
同类题型

What do you think of ______film about Lei Feng —It’s ____ good film.

The exam starts at9:00 tomorrow morning—___________ I failto arrive there on time

We all sat with plates ________ on our knees [ ]

She’s watching TV at home.

What do you want to do next We havehalf an hour before the basketball game—_____ Whatever you want to do is finewith me

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