We learn from the passage that as a teacher the writer does all of the following EXCEPT th
A.he often stays up late
B.he often feels nervous
C.he often suffers from stomachache
D.he is often worried about the effect of his teaching
A.he often stays up late
B.he often feels nervous
C.he often suffers from stomachache
D.he is often worried about the effect of his teaching
A、A biological clock makes us alert when we need to be.
B、Even if a person has worked all day and didn't make up the lost sleep, he would still be likely to feel alert at the same time every evening.
C、Clock-dependent alerting redeems a person's heavy load of sleep debt.
D、The late afternoon/evening period of mental alertness results from a lack of sleep.
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