单项选择题

A cold current is approaching from the north. We must take immediate measures to ______ crops ______ the cold.

A．protect, from
B．prevent, from
C．separate, from
D．free, from
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单项选择题
The project should be ______ in accordance with the latest estimate of the cost.
A．modified
B．filed
C．sponsored
D．retreated
单项选择题
The price of many goods in the region has been ______ ; the cost of sugar, for example, has fallen by about twenty percent.
A．cut across
B．cut off
C．cut down
D．cut in
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