单项选择题

A．We are short of paper.
B．The printing is not important.
C．We should save paper.
D．We have to pay for the paper.
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单项选择题
According to the National Science Foundation, there are more than 26, 500 Chinese students studying in U.S.A universities.
A．Y
B．N
C．NG
单项选择题
What does the word sedentary (Para. 2) mean
A．Sit still.
B．Eat too much.
C．Study very hard.
D．Passive thinking.
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