4. Bend(弯曲)both knees when yau pick up the pack, don't just bend ouer the waist(腰).

　(6) The main idea of the text is_______ (　)

　　(A) the problems made by rolling backpacks

　　(B) the goodness of backpacks

　　(C) the best backpacks for students

　　(D) how to lighten students' backpacks

　(7) From what Eblin Reyes and Shirley Park said, we know_______ (　)

　　(A) students have to carry heavy backpacks

　　(B) students have to do homework

　　(C) backpacks with wheels are bad for students

　　(D) students have no time to play because of homework

　(8) In the text "switch to" means_______

　　(A) use for　　　　 (B) turn to　　　　 (C) catch up　　　 (D) begin to use

　(9) By the words of the experts, it's better for a student of 40 kilos to carry a backpack of at most ________ (　)

　　(A) 10 kilos　　 (B) 8 kilos　　　 (C) 6 kilos　　　 (D) 7 kilos

　(10) If students follow the doctor's suggestings, they_______(　)

　　(A) may do less homework　　　　　　　 (B) may feel their backpacks are lighter

　　(C) can learn how to enjoy themselves　　 (D) will know how to use backpacks

3. The heaviest things should be packed closest to the back.

1. Lighten the load. Take home only the books the students need that night.

　2. Wide straps are better. They can send out weight over your shoulders(肩)and be sure to wear bacdpacks with two straps.

6.(福州市2002)根据短文内容选择正确答案。

(A)

　The United States has many different kinds of climates(气候). On the northwest coast(海岸), the temperature changes very little between summer and winter, but the north central(中部的)states have a very different kind of climate. In those states, people wear light clothes in summer, and they need heavy woollen clothes in winter.

　In the southwest mast, the climate is rainy and warm during the winter, but the summer is dry and hot.In the northeast of the United States, summer temperatures are very different from winter temperatures. Summer is usually hot, and winter is usually cold. Spring temperatures are warm, and fall temperatures are cool.

　Years ago, people in the cold parts of the United States didn't often get fresh (新鲜的) vegetables and fresh fruits during the summer. Today, however(然而), trucks and trains carry fruits and vegetables very quickly to all parts of the United States. In this way, Americans "send their climates" to people in other states.

　(1) The summer and winter temperatures are almost the same _______. (　)

　　(A) in the northeastern states　　　　　 (B) on the north central states

　　(C) on the western states　　　　　 　　　(D) on the northwest coast

　(2) The word "fall" in this passage means ________. (　)

　　(A) drop　　　　　 (B) down　　　　　 (C) autumn　　　　 (D) spring

　(3) Today people _______ can get fresh vegetables and fruits.

　　(A) in the north central states　　　　　 (B) in every part of the USA

　　(C) in the cold parts of the USA　　　　 (D) in the southwest part of the USA

　(4) From this passage we know that the climate of the United States ________. (　)

　　(A) is always very cold　　　　　　　　　 (B) is warm in winter

　　(C) is widely different

　　(D) changes very little between summer and winter

　(5) From Paragraph 2(第2段)we know that the climate of the southwest coast is_______.(请结合所学的地理知识作答。)(　)

　　(A) Maritime(海洋性)climate　　　　 (B) Savanna(热带划原)climate

　　(C) Mediterranean(地中海)climate

　　(D) Tropical rainforest(热带雨林)climate

(B)

　The world itself is becoming much smaller by using modern traffic and modern communication means(通讯设备). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution(污染). To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

　Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true.

　Man is now slowly polluting the whole world.

　Air pollution is still the most serious. It's bad for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

　Many countries are making rules(法规)to fight pollution. They stop people from burning coal(煤)in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollution. It is caused(引起)by heavy traffic. We are sure that if there are fewer people driving, there will be less air pollution.

　The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise. in pollution at the same time.

　(6)________, our world is becoming much smaller. (　)

　　(A) Because of the rise in pollution　　　 (B) Thanks to science development(发展)

　　(C) Because the earth is being polluted day and night

　　(D) Because the earth is blown away by the wind every year

　(7) Hundreds of years ago, life was __________ it is today. (　)

　　(A) much easier than　　　　　　　　　　　 (B) as easy as

　　(C) much harder than　　　　　　　　　　　 (D) as hard as

　(8) Pollution comes in many ways. We can even hear it. Here "it" means __________(　)

　　(A) rubbish(垃圾)(B) noise pollution　 (C) air pollution　　 (D) water pollution

　(9) Air pollution is the most serious kind of pollution because__________(　)

　　(A) it makes much noise　　　　　　　　 (B) it makes us angry more easily

　　(C) it makes our rivers and lakes dirty (D) it's bad for all living things in the world

　(10) Which of the following is NOT true? (　)

　　(A) Many countries are making rules to fight pollution.

　　(B) The pollution of the earth grows as fast as the world population does.

　　(C) The problem of pollution is not so serious because there are not so many people living on the earth.

　　(D) If people could go to work by bus or bike instead of car or motorbike, it would be helpful in fighting against the problem of SO2.