Scientists （科學(xué)家） are trying to make the deserts （沙漠） into good land again. They want to bring water to the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming deserts all the time. Scientists may not be able to change the deserts. Scientists think that people make deserts. People are doing bad things to the earth.
Some places on the earth don’t get much rain. But they still don’t become deserts. This is because some green plants are growing there. Small green plants and grass are very helpful to dry (干旱的)places. Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the earth away. When a little bit of rain falls, the plants hold the water. Without plants, the land can become deserts much more easily.
小題1:Why can the land become deserts?
A．Some places don’t get much rain.
B．Plants don’t let the hot sun make the earth even drier.
C．People don’t keep the earth well.
D．Scientists haven’t learnt enough about the deserts.
小題2:Scientists are        to make the deserts into good land again.
A．carrying waterB．growing foodC．doing nothingD．studying a lot
小題3:Which is NOT true?
A．The land never stops becoming deserts.
B．Scientists ask people to live in the deserts and grow food there.
C．People do bad things to the earth.
D．Scientists may not be able to change the deserts.
小題4:Why are green plants and grass helpful?
A．They can hold the water.
B．They can keep the earth wet.
C．They can stop the wind from blowing the earth away.
D．All the above.
小題5:Which is the best title（題目）for the passage?
A．The Desert Problem
B．People Make Deserts
C．Green Plants and Grass
D．The Deserts, the Tree and the Water

小題1:C
小題2:D
小題3:B
小題4:D
小題5:A

試題分析：本文講述了科學(xué)家們?cè)谠噲D把沙漠變回農(nóng)田，他們想把水引到沙漠，人們就可以在那里生存種植作物了，但沙漠一直在增多。植被可以防風(fēng)固沙，留住雨水。
小題1:推理判斷題。Scientists think that people make deserts. People are doing bad things to the earth.此句可以看出是人類(lèi)制造了沙漠，并且其它幾項(xiàng)與文意不符，故選C。
小題2:推理判斷題。They are learning a lot about the deserts.他們?cè)谘芯亢芏嚓P(guān)于沙漠的事情，可以推斷出答案為D。
小題3:推理判斷題。more and more of the earth is becoming deserts all the time. Scientists may not be able to change the deserts. Scientists think that people make deserts. People are doing bad things to the earth.從文中這些句子可以推斷出A、C、D都是正確的，故選B。
小題4:推理判斷題。Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the earth away. When a little bit of rain falls, the plants hold the water. 這些句子表明答案為D，上三項(xiàng)全包括。
小題5:標(biāo)題歸納題。綜合全文內(nèi)容，這篇文章談?wù)摰氖巧衬畣?wèn)題，故選A，其它幾項(xiàng)是片面的。
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