阅读理解 You might see aliens in books and movies. They look strange. They are very smart. They travel in spaceships. But are there really aliens in space? British scientist Stephen Hawking, 68, thinks so. He says that people should not look for aliens. He thinks they are dangerous. On a new British TV program, Hawking says, "It is quite possible that there are aliens in space. They might live in big spaceships. They have used up all the resources（资源）from their home planet. "He thinks such aliens are sure to get resources from Earth and then go away. They may bring troubles to Earth, too.

1. 阅读理解

You might see aliens in books and movies. They look strange. They are very smart. They travel in spaceships.

But are there really aliens in space? British scientist Stephen Hawking, 68, thinks so. He says that people should not look for aliens. He thinks they are dangerous. On a new British TV program, Hawking says, "It is quite possible that there are aliens in space. They might live in big spaceships. They have used up all the resources（资源）from their home planet. "He thinks such aliens are sure to get resources from Earth and then go away. They may bring troubles to Earth, too.

(1) Aliens in books and movies are always . A. quiet and strange B. strange and smart C. smart and cruel D. shy and cute

(2) Are there really aliens in space? A. Yes, there are. B. No, there aren't. C. We are not sure. D. There used to be some, but now they have disappeared.

(3) According to Mr. Hawking, aliens probably have .

A. used up their resources B. polluted their own planet C. destroyed the big spaceships they lived in D. travelled around the earth

(4) Mr. Hawking believes that aliens will come to Earth to . A. cause troubles B. get resources C. make a living D. make friends with humans

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1. 下面文章中有五处(第71—75题)需要添加首句。请从以下选项(A、B、C、D、E和F)中选出符合意思的首句。选项中有一项是多余选项。

We can often read interesting "facts" about space online. However,some of them are wrong. The following are some common myths(荒诞说法) about space.

Many people believe the afternoon sun is yellow. However, the light it gives out is white. The earth's atmosphere(大气层) makes the sun appear yellow and the sky appear blue.

In fact, all the asteroids (小行星) together weigh only about four percent of the moon. That's why scientists are excited when they happen to see even one asteroid crashing(碰撞) into another.

It all depends on where you believe space begins above the earth. From the International Space Station(ISS), you can see the Great Wall and many other man-made buildings. From the moon, you can't see any buildings, but you may see some city lights.

Sometimes, the moon looks very close. It seems like you can almost touch it. In fact, the moon is about 385,000 kilometres away from the earth.

Copernicus came up with this idea as early as 1543, but in fact the universe is bigger than we think. So there is no centre of the universe and everywhere in the universe can be the centre.

A. The sun is the centre of the universe.

B. The moon is very close to the earth.

C. The sun is yellow.

D. The asteroid belt is dangerous.

E. People can only see the Great Wall from space.

F. Solar system is the only system in the universe.

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