题目内容
Coal began as trees and plants.Several 1 years ago,every autumn 2 of the trees died in the forests,and more trees and plants grew.Mud and sand brought by the 3 pressed down the dead trees.
4 years went by, new forests grew.This had happened many times.By the great pressure of the earth,the mud and sand were 5 layers(层)of rock.The 6 forests were turned into layers of coal.
If you go to a mine,sometimes you can see lines 7 leaves.They help scientists to know what kind of trees and plants the coal was 8 。
Coal was probably first discovered in China.The first coal was found in the banks of rivers or from hillsides.People found this black Stone 8 for making fires.They began to 10 for it and the first coal mines were started.
1.A.thousand of B.thousands C.millions of D.million
2.A.some B.all C.none D.few
3.A.man B.water C.animals D.forests
4.A.For B .Since C.As D.With
5.A.become B.turned C.turn into D.changed into
6.A.died B.dying C.dead D.death
7.A.as B.1ike C.of D.with
8.A.called B.formed C.from D.under
9.A.could use B.could be used C.can be D.can be used
10.A.dig B.take C send D. pay
DABCD CBCBA
500 years ago in Britain, the burning of coal (煤) was increasing in cities like London. Coal was used in factories and also used to heat homes. Coal, when burnt makes a lot of smoke, which makes the air very dirty.
About 200 years ago, the Industrial Revolution (工业革命) began in Britain. Factories were built, and even more coal was burnt. Air pollution was becoming a really big problem.
Smoke and fog together make smog (烟雾). Smog was a big problem in London's winter. Because of the cold weather, more coal was burnt to warm houses and this made more smoke.
When smog stayed over a city, it became really hard to breathe and see clearly. In 1952, the Great London Smog happened and more than 4,000 people died because of the smog.
New laws (法律) were made in 1956 and 1968 to stop such sad things from happening again. These laws were called the Clean Air Acts.
These laws were made so that air would become cleaner. The laws encouraged people to use less coal or switch to other fuels such as gas. Factories started using tall chimneys (烟囱) so that the smoke would go high up in the sky and no longer cover cities, and new factories were built in the countryside. Smog appeared less often and the air became cleaner.
【小题1】From the passage, we learn that smog was a big problem in ______ in London.
| A.spring | B.summer | C.autumn | D.winter |
| A.发明 | B.换用 | C.拒绝 | D.节省 |
| A.Factories built higher chimneys. |
| B.People began to use less coal. |
| C.More People began to ride bikes. |
| D.New factories were built outside cities. |
| A.Air Pollution in Britain in the Past. |
| B.How to Make the Air Cleaner. |
| C.Smog Is Bad for the Environment. |
| D.New Laws to Stop Air Pollution. |