Before you__the street,you must look to the left and then right.
在你过马路前,必须左右看一看.
Before you__(go across)the street,you must look to the left and then right.
应该填go across 还是 going across.（P.S.我知道可以填cross）
人气：146 ℃ 时间：2019-11-09 13:43:33
解答
填go across
解析 这个是一个完整的句子 有主语 you
如果 这里没有you 就用 going across是不是before后面是一个句子，而不是动词短语，就用do 而不用 doing？是的
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