Unit 8 Save Our World
课时滚动训练
[Lessons 43—45]
Ⅰ.完形填空
Life today has brought new problems. One of __1__ problems is pollution. Water pollution __2__ our rivers and lakes dirty. It kills our fish and pollutes our __3__ water. Noise pollution makes us __4__ louder and become angry more easily. Air pollution is the most serious kind of pollution. It's bad for all __5__ things in the world.
Cars, planes and factories all pollute our air every day. Sometimes the polluted air is __6__ it is like a quilt over a city. This kind of quilt is __7__ smog(烟雾)．
Many countries are making rules to fight pollution. Factories must now clean their water before it is thrown away, and they mustn't blow dirty smoke into the air.
We need to do many other things. We can put waste things in the dustbin and not throw them on the ground. We can go to work by bike or with our friends in the same car. If there are __8__ people driving, there will be less pollution.
Rules are not __9__. Every __10__ must help fight pollution.
( )1.A. big B．the bigger
C．the biggest D．biggest
( )2.A. has made B．likes
C．let D．has taken
( )3.A. drink B．drinking
C．dirty D．living
( )4.A. to say B．saying
C．to talk D．talk
( )5.A. alive B．life C．living D．lively
( )6.A. too thick to B．thick enough to
C．such thick that D．so thick that
( )7.A. called B．calling C．call D．calls
( )8.A. less B．fewer C．a few D．a little
( )9.A. enough B．right
C．much D．important
( )10.A. people B．person
C．men D．students
Ⅱ.阅读理解
Pollution inside homes and other buildings kills more than 4 million people each year. Many people die as a result of breathing smoke or from cooking over woodpowered or coalpowered stoves.
One way to reduce the number of deaths is through cooking equipment powered by the sun. Crosby Menzies, a solar power expert in a South African company, described his latest solar cooker called the “Sol4”．“It is four square metres of
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mirrors, six to eight metres in length. It is quite a large cooker.”
The “Sol4” works by reflecting(反射) light from the sun off large mirrors. The mirrors direct (把……对准) the light at a cooking pan. Then the light heats the pan with solar energy. Within two minutes, the pan is hot enough to cook sausages and onions. In just four minutes, water can be boiled. That is as fast as cooking with natural gas or electricity.
The cooker is also much “friendlier” than other models because people do not have to stand in the sun to use it. And people can prepare meals without having to collect firewood or spend money on coal. Such individuals would be less likely to have breathing illnesses from harmful smoke.
At present, the cooker only works when the sun is shining. But engineers are working on a way to make it work without sunlight.
Each cooker costs about $2，000, which is a large amount of money for most Africans. To solve that problem, Crosby Menzies has created a nongovernmental organization called Solar Cookers for Africa. It plans to raise money through donations to provide poor people with solar cooking equipment.
( )1.This passage is mainly about ________.
A. solar cooker
B．smoke pollution
C．solar power experts
D．breathing illnesses
( )2.The “Sol4” is mainly used to ________.
A. shorten the time of cooking
B．reduce the cost of making cookers
C．raise money through donations to help African people
D．reduce the number of deaths caused by harmful smoke
( )3.The underlined word “individuals” most probably means “________”.
A. cookers B．mirrors
C．people D．experts
( )4.Which of the following about the “Sol4” is TRUE?
A. It is six to eight square metres of mirrors.
B．It can work in any weather condition now.
C．It can also heat the pan by lighting firewood.
D．It is more environmentfriendly than other cookers.
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详解详析
Ⅰ.1—5 CABDC 6—10 DABAB
Ⅱ.1—4 ADCD
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