题目内容
There are eight tips in Dr Roger's lecture on-sleep, and one or them is: ________ to bed early unless you think it is necessary.
[ ]
A.doesn't go
B.not go
C.not going
D.don't go
答案:D
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题目内容
There are eight tips in Dr Roger's lecture on-sleep, and one or them is: ________ to bed early unless you think it is necessary.
[ ]