单项选择题

To get a high score ______.

A．working hard is needed
B．one must work hard
C．working hard is very important
D．requirement is what is needed
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单项选择题
When first ______ to the market, the toys didn't attract much attention.
A．introducing
B．introduced
C．was introduced
D．being introduced
单项选择题
It is to be ______ that your health is ______ since you've been working such long hours.
A．expecting; suffering
B．expecting; suffered
C．expected; suffering
D．expected; suffered
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