In northern China during spring, big sandstorm often make trouble for people. Sandstorms usually happen in spring. They have happened in more than 10 provinces in northern China this year. People in southern China don't have to worry about this kind of bad weather. Most of the sand comes from the north of China. In northern China, lots of places have few trees and don't get much rain. When there aren't many trees, the ground can't keep enough water. Over the years, the ground dries up and turns to sand. When spring comes and the ice melts, the ground becomes loose. Strong winds take the loose sand into the sky. Besides, in northeast China, there lies some vast deserts.
Sandstorms are bad for people's health. If people breathe in too much sand, they will cough or have serious illnesses. Sandstorms also give farmers lots of problems. Sometimes their sheep get lost in the storms and never come back home. The winds also tear the farmers' houses down.
What can you do to stop sandstorms? Here's a piece of advice. Ask your parents to help you plant some trees this spring. If you see people cutting down too many trees, tell them about the dangers of sandstorms, and ask your government to stop them.
【小题1】When do sandstorms usually happen?
A.In summer.B.In spring.C.In winter.D.In autumn
【小题2】What does the underlined word "loose" mean in China?
肥沃的           B.贫瘠的        C.疏松的        D.大量的
【小题3】The second paragraph tells us ______________.
A.why sandstorms happen in northern China
B.the dangers of sandstorms
C.sandstorms aren't terrible at all
D.how sandstorms happen
【小题4】Which of the following is NOT a way to stop sandstorms?
A.Plant more trees in spring.
B.Stop people to cut down too many trees
C.Don't stay outside when sandstorms happen.
D.Tell people about the dangers of sandstorms.
【小题5】Which is the best title for this passage?___________
A.Sandstorms
B.How we can stop sandstorms
C.Why sandstorms only happen in northern China.
D.Sandstorms can influence most of China.
The seasons in Australia are not like ours. When it is winter in china, it is summer there. Australia is a southern country, it is in the south of the world. July and August are the winter months; September, October and November are spring, the summer is in January, February and December, and March, April and May are the autumn months. The north of the country is hotter than the south.
A very large part of this country has no rain at all. The east coast (海岸地区)has rain all year, and there are no dry months there. The southeast winds blows(吹) here all the year. They bring rain from the sea. There is not much rain on the west side. The southeastern part of Australia has summer rain from the southeast winds. They only blow here in summer.
The southwestern part of Australia has winter rain. The west winds blow over the southwest in winter only. In summer, the southwest of the country has no rain. In the north of Australia, there is no rain in winter. The rain comes in summer. The northwest winds bring it.
【小题1】In October, it is ______ in Australia.
A.springB.summerC.autumnD.winter
【小题2】It is ____ in the south than in the north in Australia.
A.warmerB.hotterC.colderD.cooler
【小题3】The ______ part of Australia has the most rain.
A.easternB.southeasternC.southernD.northern
【小题4】 The west winds only come over the ____ of the country in winter.
A.eastB.westC.northwestD.southeast
【小题5】There is _____ rain in winter in the north of Australia.
A.enoughB.a heavyC.moreD.no


April 22 is Earth Day. Everyone on Earth should care about and protect the earth!
The earth has warmed by about 1°F (华氏度) over the past 100 years, but why and how?
Well, scientists are not quite sure. Maybe the earth gets warmer and warmer on its own. But many scientists say that people are doing many things which makes the earth warmer.
First, greenhouse effect (温室效应) is a very important reason for the change of the earth. People give out too much energy into the air every year. It makes the earth warmer. Climate (气候) change is another important reason. Sometimes it becomes too hot and sometimes too cold. Sometimes there is too much rain and sometimes too little. The change of the climate makes the earth warmer. In turn, the warmth of the earth changes the climate, too.
When the earth becomes warmer, there may be more rain and a rise in sea level. It will affect the growth of plants, animals and people. On a Pacific island, 100 people have to move to higher ground because the sea is rising. These people can no longer live on the coast. Before that, two islands without people went underwater in 1999. Scientists say that the seas can rise by nearly one metre by 2100.
People can affect the earth's air, land and water. As for us, we can do many things to protect the earth. For example, we can use fridges less. We can tell more people about protecting the earth.
【小题1】Earth Day is probably set for people to ______.

A.learn more about the earthB.make full use of the earth
C.take better care of the earth.D.study the warmth of the earth
【小题2】We can infer (推断) from the passage that the reasons for the warmer earth are
______ now.
A.not very clear B.completely secretC.well knownD.not given yet
【小题3】Greenhouse effect comes from______.
A.sea risingB.climate changeC.nature's unbalanceD.people's activity
【小题4】The passage mainly tells us that ______.
A.there is more rain nowB.we should protect the earth
C.we must stop pollutionD.sea level is getting higher

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