题目内容
句型转换(根据上文完成下文,句意不变)
A:They couldn't catch up with the others.
B:They ________ ________ the others.
答案:fell,behind
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题目内容
句型转换(根据上文完成下文,句意不变)
A:They couldn't catch up with the others.
B:They ________ ________ the others.