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第1题

8、 It was several minutes ______ the police arrived at the spot. A. when B. before C. after D. that
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第2题

7、 ——Could you do me a favor and take the box up to the top floor? ——___________. A. With pleasure. B. My pleasure. C. N
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第3题

6、 With a lot of things ______, the manager felt quite upset. A. done B. doing C. to do D. to be done
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第4题

5、 Was it at five o’clock _____ the fire broke out? A. when B. that C. since D. before
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