the road don’t forget to look both ways.A. As crossingB. While you crossC. While crossing

问题补充：

the road ,don’t forget to look both ways.

A. As crossing

B. While you cross

C. While crossing

D. Cross

答案：

A. As crossing

B. While you cross

(答案→)C. While crossing

D. Cross

解析：

这题考查时间状语从句的省略式，当主从句的主语一样时，可以省略从句的主语和be动词，这题的while crossing就省略了you are，句意是：当你过马路时，别忘了两边看看。选C。