摘要： There are eight tips in Dr. Smith’s lecture on sleep, and one of them is: to bed early unless you think it necessary. A. doesn’t go B. not to go C. not going D. don’t go
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There are eight tips in Dr Smith's Lecture on sleep, and one of them is：
________ to bed early unless you think it is necessary．
[ ]
A．doesn't
B．not to go
C．not going
D．don't go