Question

（） the road,dont forget to look both ways. A.as c

（） the road,dont forget to look both ways. A.as crossing B.while you cross C.while crossing d.cross 选C 考点是啥？其他选项错在哪儿？

Answer 1

当伍前亩while,when引导从句，且省略主语（主语与主句相同）时，动词要用ing形式。故选C。悔锋
望腔森采纳！！