This is cereal． delicious． A．It's B．Its C．They're D．He's 题目和参考答案——青夏教育精英家教网—

题目内容

This is cereal．_________delicious．

A．It's　　　　 B．Its　　　　　　 C．They're　　 D．He's

答案：A
解析：

用it来代替前面所提到的物。“Its”是形容词性物主代词。

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Once every four years,men from all over Greece came to join in a great athletic festival in Elis,in western Greece. This was called the Olympic Games because the place was called Olympia. We don't know when men first began ce]ebrating the Olympic Games, but they had certainly already done it in the time of' Homer,by 776 BC. The games were so regular(有规律的) that people used them to date by. They would say,"I was born in the second year of the twenty-fourth Olympiad ( starting from776 BC). "
When it was time for the games, the rulers (统治者) of Elis sent the massage all over Greece. They declared a truce(宣布休战) throughout the Greek world for a month. No matter whom they had a war with,they had to stop the war and let their players go through their city state safely to get to the Olympic Games. Each city state paid for a few players from their city to travel to Elis. But the player had to promise that they had already practiced for at least ten months.

1. The underlined word "athletic" is related to .

A. music
B. time
C. places
D. sports

2. Elis is in the of' Greece.

A. east
B. south
C. west
D. north

3. The twenty-fourth Olympics must be held in .

A. 680 BC
B. 684 BC
C. 688 BC
D. 692 BC

4. How long should the truce last because of the Olympic Games?

A. A day.
B. A week.
C. A month.
D. A year.

　　　 Scientists have helped people understand the dangers the earth is facing.As people live on the earth, we should be fully ready to deal with the dangers.If we do not pay more attention to the problems caused by air pollution, our earth may no longer be a healthy place for plants, animals, and people to live.

　　　 Cleaning up the air is a job that all countries must work on.The problems caused by air pollution can be solved, but a lot of work needs to be done.Governments around the world are beginning to work together to lower the levels of dangerous gases in the atmosphere (大气层).If this can be done well, the ozone layer (臭氧层) can rebuild itself, global warming can be controlled, and acid rain can be reduced.

　　　 In 1967, the government of the United States passed the Clean Air Act.More parts were added to the act in 1970, 1977 and 1990.As a result of these laws, cars now must reduce the amounts of harmful gases.Power factories must use “clean coal” methods to reduce acid?rain gases they produce.

　　　 In 1970, the Environmental Protection Agency (EPA) was set up.The EPA's job is to make sure that the environmental laws are being followed and to find out new dangers and offer solutions.The first Earth Day was also ce?lebrated in 1970.

　　　 While it is very important to address with air on a global scale, each person can also do something to protect the earth.Here are some things you can do every day：

(1)Turn down the heat and air conditioning.

(2)Use the dishwasher only when there are full of dishes.

(3)Practice the 3 Rs: recycle, reuse, and reduce.

(4)Plant a tree.

(5)Walk or ride your bike.

(　　)6.If we don't care about ________ problems, our earth may no longer be a healthy place.

A.air pollution B.water pollution

C.noise pollution　 D.sea pollution

(　　)7.Every country should ________ to solve the problems caused by air pollution.

A.rebuild the ozone layer　　　 B.clean up the air

C.produce harmful gases D.reduce acid?rain gases

(　　)8.All the things the EPA can do is to ________.

A.make more laws 　　　　　　B.find out new dangers

C.protect the environment D.plant trees

(　　)9.The Clean Air Act was passed ________ by the American government.

A.In 1967　 B.In 1970 　C.In 1977 D.In 1978

(　　)10.In our daily life, we can do something to protect the earth by ________.

A.using more cars B.riding the bikes

C.cutting down trees　 D.turning up the heat

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