单项选择题

The project required ten years of diligent research().

A. hardworking
B. social
C. basic
D. scientific

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单项选择题
They can put up with the poor living condition.()

A. tolerate
B. accept
C. support
D. refuse
单项选择题
It's been a privilege to meet you, sir, the young man said to the artist as he was leaving.()

A. a pleasure
B. an ambition
C. an honour
D. a sad occasion
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