2. 外语
  3. 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.

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.

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问题 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.
选项 A、doesn’t go
B、not to go
C、not going
D、don’t go
答案D
解析 对祈使句进行否定时，直接在前面加don’t。
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