Look left and right before you the road.A. acrossB. crossC. throughD. though

问题补充：

Look left and right before you the road.

A. across

B. cross

C. through

D. though

答案：

A. across

(答案→)B. cross

C. through

D. though

解析：句意：再过马路之前 左右看看。缺少动词成分，A横过……介词，B横过，动词，C穿过，介词，D虽然，连词，故选B，动词。