单项选择题

The staff of the company are always courteous and helpful.

A．efficient
B．respectable
C．well-informed
D．respectful
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单项选择题
He began his talk by giving a concise definition of post-modernism.
A．long and detailed
B．short and clear
C．comprehensive
D．professional
单项选择题
Although originally a German innovation, kindergarten got its real start in the United States as a movement to provide an improved learning environment for children.
A．an easy
B．a playful
C．an open
D．a better
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