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单项选择题

As China is such a populous country, the present concern for most people is still ______.

A. starches B. substance C; sustenance D. substitute

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热门试题

单项选择题He is too young ______ the old society.

A．to see
B．to have Seen
C．to seeing
D．to having seen

单项选择题I'm at my wits' end. Tell me to do.

A．how
B．what
C．when
D．why