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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Many visitors find the tempo of life here very difficult.()

A. kind
B. growth
C. speed
D. spectacle
单项选择题
The book took ten years of thorough research.()

A. basic
B. social
C. major
D. careful
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