Mr. Green said his clients______ our samples by the end of last month.A、didn ’ t

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问题 Mr. Green said his clients______ our samples by the end of last month.

选项 A、didn ’ t receive
B、hadn ’ t received
C、haven ’ t received
D、don’t receive

答案 B

解析本句的意思是：格林先生说，到上个月月底为止他的顾客还未收到我们的样品。根据题意，此句谓语动词所表示的动作是“过去”(上个月底)的“过去”，因此应用过去完成时。

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Theteacherhashisstudents______asubjectreporteverymonth.A、towriteB、wr