单项选择题

The policeman was in plain clothes, watching for a______character at the airport all night.

A. suspicious
B. suspect
C. susceptible
D. doubtful
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I'm in a hurry, and I'll see you______time.
A. the other
B. in another
C. other
D. some other
单项选择题
If you want to apply for the vacancy, you should have______in at least two languages.
A. efficiency
B. proficiency
C. experience
D. practice
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