(  ) 4.——Is this bag heavier than that one?

      ―No,it's only      that one.

A.   as heavy as three fifths

B.   as heavy as three fifth

C.   three fifths as heavy as

D.   three fifth as heavy as

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(   ) 5.——Jerry, the floor is too dirty. You should help your mother      

     —OK,Dad.

A.   do some homework

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C.   do some shopping

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A：Hi, Amy!Have you watched the live program about Shenzhou X flight to space?

B：Of course. I feel so excited.

A;So do I. I really admire Nie Haisheng, Zhang Xiaoguang and Wang Yaping， especially Wang Yaping. She gave us a wonderful physics lesson. 1

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A;Oh,but I know little about computer technology. 3 What are you going to be?

B; 4 Maybe I'm going to be a scientist in the future. 

A：Wow！That's great!5 

B：Let's work hard together！

A.    Mmm,I'm not sure.

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C.    I'd like to be an astronaut like them when I grow up.

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E.    They must be strong, healthy and clever enough.

1._______ 2.________ 3.________

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 Our sun is a star. Like all stars,it is a mass of(~"大團(tuán))very hot gases. The sun，s energy doesn't come from burning fuels(燃料).

The sun's energy comes from its nuclear fusion(核聚變）.How big is the sun? Its diameter，the distance across its center, is quiet huge. That's more than one hundred times the diameter of

Earth. The sun's volume is more than a million times the volume of Earth. Another way to say this is that the sun could hold one million Earths inside(在.. 內(nèi))it.

   The sun has different layers(層)of gases. Each layer mixes into the next，like the layers of Earth's atmosphere(大氣).Most of the sun's mass is in its center. It is also very hot. Almost all fusion takes place in the center.

   The sun creates energy in the form of heat and light. Even though the sun is a ball of gases, it is made up of several layers. The main layers are the center. There are also other layers. The sun produces huge energy. Its energy mainly comes from its center. The sun is the source of most of the energy on Earth. Without the sun,there will be no living things on earth,including human beings.

根據(jù)短文內(nèi)容，選擇最佳答案。

(   ) 1. What are the gases of the sun like?

A. Burning. B. Very hot.

C. Very bright. D. All of the above.
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A.   About 6300 kilometers.

B.   About 63000 kilometers.

C.   About 630000 kilometers.

D.   About 6300000 kilometers.

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根據(jù)短文內(nèi)容，選擇最佳答案。

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C.    By videos or photos.

D.    By words or articles.

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A.   the aliens

B.   the UFOs

C.   the natural phenomena

D.   the man-made objects

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(   ) 5. Our English teacher spoke slowly       the students could hear clearly.

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