单项选择题

A research center has been set up in this country.

A. praised
B. established
C. reformed
D. criticized
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单项选择题
Their parents once lived under very severe conditions.
A. sound
B. hard
C. strict
D. tight
单项选择题
We are certain that he will get over his illness.
A. sure
B. surprised
C. happy
D. excited
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