【題目】—Must I turn off the gas after cooking?

—Of course. You ________ never be careful enough with that.

A. must B. can

C. may D. should

【答案】B

【解析】考查情態(tài)動詞�！谧鲲堃院笪冶仨氷P掉煤氣嗎？——當然。你越小心越好。“cannot/can never be too...”是固定句型，意為“越……越好”或“再……也不過分”。故選B。

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