There are eight tips in Dr.Roger's lecture on sleep，and one of them is：________ to bed early unless you think it is necessary.

A．doesn't go B．not to go

C．not going D．don't go

 

D

【解析】考查特殊句式。句意：在Roger博士關(guān)于睡眠的講座里面共有八點(diǎn)忠告，其中之一是：除非你認(rèn)為有必要，否則不要太早上床睡覺。分析句子結(jié)構(gòu)可知，冒號(hào)后的句子是一個(gè)祈使句，故選D項(xiàng)。

 

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