成人英语三级考试

【单选题】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.
A. doesn't go
B. not to go
C. not going
D. don't go

网考网参考答案：D
网考网解析：
[考点] 祈使句 [解析] 对祈使句进行否定时，直接在前面加don't。 查看试题解析出处>>