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
<上一题 目录 下一题>
热门 试题

单项选择题
Because of road works, traffic is restricted to one ______ in each direction.
A．lane
B．row
C．alley
D．path
单项选择题
She speaks as though she ______ on the spot.
A．was
B．were
C．had been
D．is
相关试题