问题
选择题
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
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。