---Youshouldbecarefulwhen

問題詳情：

--- 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

知識點：相似 相近詞比較

題型：選擇題