It is the second-brightest object in our night sky after the moon. It is one of man's the greatest scientific achievements. It's the International Space Station (ISS) that moves around Earth.

Nov 20 is the stations’ 20th birthday. In 1998, the first piece of the ISS was sent into space. Since then, 230 people from 18 countries have visited it. Five space agencies –those of the United States, Russia, Canada, Europe and Japan- worked together to build it. Weighing about 450 tons, it contains many different parts.

Generally, the ISS holds three to six people at one time. Astronauts living there work on a variety of different science projects. The ISS has hosted over 1, 500 such projects, according to NASA(美国航空航天局) But the station's hardware is aging. In 2011, Russia announced that the ISS will be retired (退役) in 2020 in order to prevent it from becoming dangerous "space junk". However, the US later said it would use repairs to make its service life longer to 2025.

The ISS costs 21-28 billion yuan to operate each year. Many believed that this money could be better spent improving conditions on Earth. In February, US President Donald Trump announced plans to end support for the ISS by 2025. The US will use its money for other projects, like next-generation rockets and deep-space missions.

Although China is not part of the ISS program, it has helped with some of the station's experiments. China will soon have its own space station, becoming the third country after Russia and the US to do so. The station is set to be finished around 2020.

1.How many people have already visited the ISS since 1998?

A.18 B.230 C.450. D.1500

2.According to the US, if it is repaired, how many more years will the ISS serve before it retires?____

A.5 years B.20 years C.22 years D.27 years

3.What do we know about the ISS from this article?

A.The US built the ISS all by itself.

B.The ISS can be used for 20 years

C.China is part of the ISS program and has its space station

D.21-28 billion yuan is spent operating the ISS every year.

4.Which of the following can be the best title for this passage?____

A.Opinions on the ISS B.Brightest Object in Space

C.Facts about the ISS D.How much to Run the ISS

Our family went to the Yellow Stone National Park last summer vacation.Our son,Tom,wanted to see bears there.And what an interesting experience it was!

When we got there,we put up our tent and went to explore(探险).As we returned,we heard our daughter Susie cry out.And then we saw a bear go into our tent.

Tom wanted his father to chase(追赶)him away.His father said,“No.It's dangerous to chase a bear.And don't let him chase you.” Susie said,“What shall we do?Maybe we should climb a tree.” Tom said,“No.We have to get him out there.He might go to sleep in our tent.” “Maybe we could make him leave if we put some honey outside for him to eat,” Susie said.Then I said,“How are you going to get the honey?It's in the tent.” We watched the bear go into the tent and heard him upset(弄翻)everything inside.“It's foolish for us to try to chase him away,” said my husband.“Leave him alone and wait for him to come out.” We waited,but the bear stayed inside.We had to sleep in the car that night.

1.Last summer vacation Tom wanted to see________.

A.tigers B.wolves C.bears D.birds

2.Where did the family go on vacation last summer?

A.They went to Central Park. B.They went to the Yellow Stone National Park.

C.They went to a zoo. D.They just stayed at home.

3.What did they do when they saw a bear go into their tent?

A.They chased the bear away. B.They stayed outside the tent and did nothing.

C.They climbed up a tree. D.They put some honey outside for the bear to eat.

4.What did the bear do in the tent?

A.He ate the honey. B.He chased the family away.

C.He drank the beer. D.He turned things upside down.

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