单项选择题

______average must a fellowship student maintain

A．How high
B．What high
C．How high an
D．What a high
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单项选择题
Prof. Ward hardly ever went to ______ the theater.
A. neither the cinema nor

B. either the cinema nor
C. neither the cinema or

D. either the cinema or
单项选择题
Vegetables are cheap ______ when they are in season.
A. buying


B. to buy
C. to be bought


D. to buy them
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