单项选择题

It is a complicated problem.

A. strange
B. complex
C. difficult
D. unusual
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单项选择题
In Britain and many other countries appraisal is now a tool of management.
A. evaluation
B. production
C. efficiency
D. publicity
单项选择题
Mary has blended the ingredients.
A. mixed
B. made
C. cooked
D. eaten
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