单项选择题

Her husband is interested in designing electronic ______.

A. management
B. safety
C. devices
D. routine
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单项选择题
He was regarded as a great ______ to the committee.
A. asset
B. profit
C. prosperity
D. interest
单项选择题
The post office is not ______ for damage to a parcel sent by mail unless it is insured.
A. qualified
B. liable
C. guilty
D. jealous
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