People have planted a great many trees i
题型:选择题
问题:
People have planted a great many trees in order to________wind and sand in the desert. [ ]
A. hold down
B. hold up
C. hold back
D. hold out
People have planted a great many trees in order to________wind and sand in the desert. [ ]
A. hold down
B. hold up
C. hold back
D. hold out