单项选择题

Modern medicine and new methods of food production allow adults to live longer and babies to （）easier.

A. exist
B. extinct
C. survive
D. revive

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单项选择题
It is believed that high interest rates （） people from borrowing money from the commercial banks.

A. discourage
B. decrease
C. disgust
D. disturb
单项选择题
We are willing to allow you （） at 10% calculated on gross profits.

A. commodity
B. consignment
C. conveyance
D. commission
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