决策过程中发现问题就是指发现实际存在的问题。()
A. 正确
B. 错误
Why should people call Greyhound for tickets in advance？
A. To avoid waiting in lines at the booking office．
B. To hand in necessary travelling documents．
C. To get tickets from the nearest terminal．
D. To fix the travelling destination in time．
听力原文：Will you be free this weekend？
(5)
A. I'm not in the office.
B. No, I am.
C. I have homework to do.
D. I'm a student.
Night-shift workers are those who ______．
A. have to pay on their internal clock
B. need to re-adjust their clock
C. fall asleep late at night
D. have to work at night
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