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| Scientists are trying to make the desert into good land again.They want to bring 1to the desert. So people can live and 2food.They are working a lot on the desert.But more and more ground 3 desert all the time.Scientists may not be able to change the desert 4 time. Why is more and more land becoming 5? Scientists think that 6 make desert.People are doing 7 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 wind 10 the 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 |
B.water B.plant B.became B.in B.mountains B.animals B.bad B.So B.Animals B.blow |
C.food C.eat C.becoming C.for C.desert C.plants C.nice C.But C.People C.blowing |
D.sun D.cook D.is becoming D.at D.hole D.birds D.a lot of D.Because D.Birds D.blows |