单项选择题

Some crops are relatively high yielders and could be planted in preference to others to ______ the food supply.

A．enhance
B．curb
C．disrupt
D．heighten
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单项选择题
If you want to get into that tunnel, you first have to _________ away all the rocks.
A．haul
B．repel
C．dispose
D．snatch
单项选择题
Executives of the company enjoyed an _________ lifestyle of free gifts, fine wines and high salaries.
A．exquisite
B．extravagant
C．exotic
D．eccentric
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