Be careful _ too fast, or there _ be an ...

Be careful _ too fast, or there _ be an accident.

A．not to drive; must	B．to not drive; may
C．not drive; must	D．not to drive; may

D 【解析】试题分析：本题的含义是当心开车不要开得太快，否则可能会发生交通事故。Be careful not to do表示当心不要做某事的意思，动词不定式的否定形式在to do前加not，may表示可能性或许的意思，故本题选D。考点：动词不定式的否定形式。

考点分析：

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