单项选择题

In order to be a good scientist, ______.

A. mathematics is urgent
B. one should have the mathematics
C. one must understand mathematics
D. mathematics is important to be understood
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单项选择题
According to official statistics, retail sales in China rose 10% and 12.2% in the first and the second quarter ______ this year.
A. accordingly
B. correspondingly
C. respectively
D. individually
单项选择题
Who won the election for mayor A man ______ to represent every minority group in the city.
A. claim
B. is claimed
C. claimed
D. claiming
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