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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The advertising company was surprised by the adverse public reaction to the poster.
A. delayed
B. quick
C. positive
D. unfavorable
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
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