Question

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

Answer 1

C

hold down压制，限制；hold up推迟，耽搁；hold back阻挡，抑制；hold out提供，提出。句意：人们种了大量的树，为了阴挡风和沙尘。由此可知答案为C项。