单项选择题
He has established himself to be a
competent
manager by his successfully handling several difficult tasks.()
A. definite
B. effective
C. qualified
D. deficient
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单项选择题
They always mock me because I am ugly.
A. smile at
B. look down on
C. belittle
D. laugh at
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单项选择题
Continuous short buzzes on the telephone indicate that the line is busy after you dial the telephone number.
A. open
B. out of order
C. disengaged
D. in use
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