It is very important to obey the traffic rules when______(cross)the street.
问题描述：
It is very important to obey the traffic rules when______(cross)the street.
答
crossing此句话为时间状语重句，后边用动名词加宾语的形式构成时间状语、还有什么问题请继续问、望采纳该回答、谢谢
答
吧u
答
crossing
在过街时,遵守交通规则是很重要的.
答
crossing
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