In recent years, there have been nearly 5,000 official competitors and that takes three whole minutes for the crowd of runners j

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问题 In recent years, there have been nearly 5,000 official competitors and that takes three whole minutes for the crowd of runners just to cross the starting line.

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答案代词误用,应把that改为it。

解析 本句是并列句,连词and后面是一个独立的句子,这个句子的真正主语是后面的不定式to cross the starting line,需用it作形式主语。此外还可以通过“it takes some time for sb.to do sth.”句型来判断应该用it。
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