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Which of the two options is correct? ——I saw Mr. Smith buying apples on the street this morning. ——It ___________ him. He has gone to Hong Kong. A. can't have been B. can't be
2018年11月4日 10:22
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回答 · 3
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Hi Icespirit, A is the correct answer as the speaker is speculating on something that happened in the past.
2018年11月4日
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3
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