单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．Write their lab reports.
B．Finish their chemistry experiments.
C．Find out Professor Smith’s schedule.
D．Interview some high school students.
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单项选择题
A．They felt happy and relaxed.B．They felt thirsty and sleepy.C．They felt tired and uncomfortable.D．They felt less tired and more energetic.
A．They felt happy and relaxed.
B．They felt thirsty and sleepy.
C．They felt tired and uncomfortable.
D．They felt less tired and more energetic.
填空题
I)。
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