单项选择题

We won’t have safe neighborhoods unless we’re always ______ on drug criminals.

A. tough
B. rough
C. thorough
D. enough
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单项选择题
He displayed a complete lack of courtesy and tact in dealing with his employer.
A. tenacity
B. curiosity
C. civility
D. hostility
单项选择题
A. At the drug store. B. In the hall. C. From a machine. D. In a store.
A. At the drug store.
B. In the hall.
C. From a machine.
D. In a store.
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