016 六级真题 10年 6月 A 12题
来源:沪江听写酷
2011-04-03 15:00
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Question 12
W: Doctor, I haven't been able to get enough sleep lately, and I'm too tired to concentrate in class.
M: Well, you know, spending too much time indoors with all that artificial lighting can do that to you. Your body loses track of whether it's day or night.
Q: What does the man imply?