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

正确答案是：

同类题型

下列各句中，没有错别字的一项是

Fully ________ in preparing for the coming exam, she no longer has time to enjoy the various activities in her neighborhood.

.She will tell us why she feels so stronglythat each of us has a role ______ in making the earth a better place to live.

______ of my parents like me very much. ______ of us in my family are friendly.

How long can I keep the book? —-A week．You _____to return it by Monday