问题
People have planted a lot of trees and grass in order to ____ wind and sand in the desert.
A:hold down
B:hold up
C:hold back
D:hold out
B:hold up
C:hold back
D:hold out
正确答案是：
同类题型
，the wind died down and people began to appear on the street
ather turned out to be very good, _________was more than we could expect.
Not until the man i，n black took off his dark glassesthat he was the famous film star.
The old house ______________ roof was damaged in a storm is being repaired now.