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29. ---Sorry, Professor Smith. I didn\'t finish the assignment yesterday.
---Oh, you have done it as yesterday was the deadline.
A. must B. mustn\'t C. should D. shouldn\'t
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29. ---Sorry, Professor Smith. I didn\'t finish the assignment yesterday.
---Oh, you have done it as yesterday was the deadline.
A. must B. mustn\'t C. should D. shouldn\'t
´ð°¸£ºC