We have planted many trees in order to wind and sand in the desertA.hold downB.h
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We have planted many trees in order to ____wind and sand in the desert
A.hold down
B.hold up
C.hold back
D.hold out
试题答案
C
题意：我们种了大量的树，为了阴挡风和沙尘。hold down压制，限制；hold up推迟，耽搁；hold back阻挡，抑制；hold out提供，提出。