完形填空
Scientists are trying to make the desert into good land again.They want to bring1to the desert.
So people can live and2food.They are working a lot on the desert.But more and more ground3
desert all the time.Scientists may not be able to change the desert4time.
Why is more and more land becoming5? Scientists think that6make desert.People are doing7
things to the earth.
Some places on the earth don't have many rivers.8they still don't become desert.This is because
some green plants are growing there.Small green plants and grasses are very important to bad places.9
don't let the hot sun make the earth even drier.Plants don't let the wind10the dirt away.When a little
bit of rain fall,the plants hold the water.Without plants,the land can become a desert much more easily.
(     )1.A.air
(     )2.A.grow
(     )3.A.becomes
(     )4.A.on
(     )5.A.rivers
(     )6.A.people
(     )7.A.good
(     )8.A.And
(     )9.A.Plants
(     )10.A.to blow

查看答案