—Youshouldbecarefulwhen

问题详情：

— You should be careful when ________.

— Yes, I will. I’d like to know when ________ to have a rest.

        A. driving; stopping                                  B. driving; to stop  

        C. to drive; stopping                                  D. to drive; to stop

【回答】

B

知识点：相似 相近词比较

题型：选择题