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英语
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I think Jack___ the answer 为什么knows可以而has known 不可以
人气：467 ℃ 时间：2020-02-06 03:50:02
解答
这里是陈述一个客观事实的,如果强调“由不知道到知道”这个转变过程,就得说：
I think Jack has got to know the answer.
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