Question

【题目】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. don't go D. not going

Answer 1

【答案】C

【解析】解析：Roger博士的报告中关于睡眠的八个方法，并且其中之一就是如果不是你认为必需就不要上床太早。根据题干中的标点冒号可知，空后是祈使句，祈使句以动词原形开头，否定形式在句首加don’t，故选C。