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1 . It was the first time that sb. had done sth. 这是某人第一次做某事
这是他第二次参与怎样解决这个问题的讨论。
It was the second time that he________ about how to deal with the problem.
这是他第二次参与怎样解决这个问题的讨论。
It was the second time that he
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