题目内容：
The traditional view is ________ we sleep because our brain is “programmed” to make us do so.A．whenB．whyC．whetherD．that
参考答案：
单选题：The traditional view is ________ we sleep because our brain..
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If you are too formal, people around you won't be _____. [..
If you are too formal, people around you won't be _____. [ ]A. at ease B. in danger C. in common D. at work
He kept me well supplied _____ cups of coffee while I wrote ..
He kept me well supplied _____ cups of coffee while I wrote the report. [ ]A. to B. with C. in D. for
He's given me so much help that I really want to do somethi..
He's given me so much help that I really want to do something for him _____. [ ]A. in returnsB. by turns C. in return D. in answer
He wants to see changes in the company and I am sure he will..
He wants to see changes in the company and I am sure he will ______. [ ]A. on time B. at a time C. at one time D. in time
The old man has devoted half his life _____ helping the weak..
The old man has devoted half his life _____ helping the weak. [ ]A. of B. to C. by D. for