Question

【题目】________ careful! ________ cross the road when the traffic light is red.

A.Be; NotB.Be; Don't

C.Do; Can'tD.Do; Don't

Answer 1

【答案】B

【解析】

句意：小心！当交通灯变红时不要过马路。

考查祈使句的否定及be动词，祈使句，动词原形开头，careful形容词，和be连用。Be careful小心，排除CD；第二空是否定祈使句，其结构是Don’t+动词原形，Don't cross the road不要穿过马路。根据题意，故选B。