单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．$ 4800.
B．$ 6000.
C．$ 4000.
D．$ 2000.
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单项选择题
A．He hopes to meet the professor soon.B．He doesn’t like the professor at all.C．He is happy that Prof. Smith will be the dean.D．He wants Prof. Smith to be the new dean.
A．He hopes to meet the professor soon.
B．He doesn’t like the professor at all.
C．He is happy that Prof. Smith will be the dean.
D．He wants Prof. Smith to be the new dean.
单项选择题
As far as the sleep experts are concerned, the most quality sleep ______.
A．can make people feel alert
B．should be dependent on caffeine
C．may cause morning dullness
D．is related with mid-afternoon sleepiness
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