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 team has worked hard and its efforts have been ____with success.
He was so careless that he left _____thedoor ____.
May I smoke in the room? –No, you______________. It’s a non-smoking room..
“I love traveling. I hope to go with youthis time.” “But does your mother _____ you to go”
Will you read me a story, Mummy?–OK. You ________have one if you go to bed as soon as possible.