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题目
david is the person (whom or who) i have been know for a long time.I met him at the first day i just came to Canada.He (is or was) a hospitable person.

提问时间:2021-01-03

答案
david is the person (who) i have (去掉been)( known) for a long time.I met him (at 改为on)the first day i just came to Canada.He (is ) a hospitable person.
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