单项选择题

Questions 17-20 are based on the following monologue.
How many people received food aid from the World Food Program last year

A．25,000,000.
B．40,000,000.
C．77,000,000.
D．82,000,000.
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单项选择题
Why is the book placed on reserve
A．It needs to be preserved until reprints come out.
B．It is the only copy of the kind and must be kept intact.
C．It is the professor’s own book put in the library.
D．It needs to be read by every one of the class.
单项选择题
What kind of work will T-A’s be paid to do, according to the speech
A．Grading the students’ assignments.
B．Giving lectures to all the students.
C．Writing reports once a week.
D．Buying laboratory equipment.
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