Mr. Johnson said that his clients _______ our samples by the end of last month. ( 章节：7 难度：3)
- A、didn’t receive
- B、hadn’t received
- C、haven’t received
- D、don’t receive
正确答案:B
答案解析:有
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Mr. Johnson said that his clients _______ our samples by the end of last month. ( 章节：7 难度：3)
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