Wind is the great maker of waves. There are exceptions (例外), such as the tidal (潮汐的) waves sometimes caused by earthquakes under the sea. But the waves most of us know are caused by winds blowing over the sea .

Now let’s learn some physical (自然地理学的) things about it. A wave has height, from low point to high point . It has length (长度)--the distance from this high point to that of the following wave. The period of the wave means the time it takes for succeeding high points to pass a fixed point. None of these things stays the same--for all depend upon (依靠)the wind, upon the depth (深度) of the water and many other matters.

The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position (原先的位置). And it is lucky that this is so. For if the huge groups of water that make up a wave really moved across the sea, sailing would be impossible. If we want to find the speed of a wave, we may use the following way : Speed =" wavelength" × frequency (频率).

Here, wavelength is the distance between two high points , frequency means the number of cycles per second

1.What causes waves?

A．Earthquakes and nothing else.	B．Only wind.
C．Wind causes most waves.	D．Wind causes some waves.

2.Which of the following is TRUE according to the passage?

A．The water of a wave moves away across the sea.

B．The water of a wave remains almost at the same place.

C．The water of a wave goes with the passing of the wave.

D．The length of a wave means the distance from the top of a wave to the bottom.

3.The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300, while its speed is twice that of Wave 1. Which of the following is right?

A．The wavelengths of the two are equal.

B．The wavelength of Wave 1 is 10 times longer than that of Wave 2.

C．The wavelength of Wave 2 is longer than that of Wave 1.

D．The wavelength of Wave 1 is longer than that of Wave 2.

4.Where can we find this passage?

A．music magazine

B．fashion magazine

C．scientist magazine

D．sports magazine

 

If you go to Egypt, you’ll see a lot of pyramids. The biggest of all is the Great Pyramid. It is about 137 meters high and made of 2,300,000 big stones. Each stone weighs about two and a half tons（吨）.The biggest ones even weigh fifteen tons. It took more than 100,000 men twenty years to build it. Nobody can tell just how the men cut, carried and lifted（举）the huge stones without our modern machines（机器）.
The Egyptian kings told the people to build the pyramids for themselves. They thought they had tombs （坟墓）strong enough to keep their bodies well until they came back to life. But they never thought that about 5,000 years later their bodies would be on show in museums.
【小题1】The Great Pyramid is in ________.

A．China

B．Japan

C．Egypt

D．France

【小题2】 A pyramid is ______.

A．a house

B．a huge stone

C．a king’s tomb

D．the name of a museum

【小题3】The Great Pyramid is about _______ and made of _______ huge stones.

A．137 metres high; 100,000	B．137 high metres; 2,300,000
C．137 metres; 2,300,000	D．137 meters high; 2,300,000

【小题4】Pyramids are built for _______.

A．the kings

B．the queens（皇后）

C．the kings' teachers

D．People

【小题5】The kings thought they had the pyramids built to keep their bodies until _________.

A．they came home	B．they became alive
C．they die	D．they were on show in museums

If you go to Egypt, you’ll see a lot of pyramids. The biggest of all is the Great Pyramid. It is about 137 meters high and made of 2,300,000 big stones. Each stone weighs about two and a half tons（吨）.The biggest ones even weigh fifteen tons. It took more than 100,000 men twenty years to build it. Nobody can tell just how the men cut, carried and lifted（举）the huge stones without our modern machines（机器）.

    The Egyptian kings told the people to build the pyramids for themselves. They thought they had tombs （坟墓）strong enough to keep their bodies well until they came back to life. But they never thought that about 5,000 years later their bodies would be on show in museums.

1.The Great Pyramid is in ________.

A. China          B. Japan           C. Egypt            D. France

2. A pyramid is ______.

A.a house         B. a huge stone      C. a king’s tomb      D. the name of a museum

3.The Great Pyramid is about _______ and made of _______ huge stones.

A.137 metres high; 100,000             B.137 high metres; 2,300,000

C.137 metres; 2,300,000                D.137 meters high; 2,300,000

4.Pyramids are built for _______.

A. the kings       B. the queens（皇后）  C. the kings' teachers      D. People

5.The kings thought they had the pyramids built to keep their bodies until _________.

A. they came home                    B. they became alive

C. they die                           D. they were on show in museums

 

Darren ___ the huge stone animals lining the passage.

A．was surprised to	B．was surprised with
C．was surprised at	D．was surprise at

 

补全对话（5分）

根据下面的对话情景，在每个空白处填上一个适当的句子，使对话意义连贯，完整。

(Michael and Kangkang meet at the school gate.)

A: Hello, Kangkang.

B: Hi, Michael.

A: I called you just before I left home ,but you were not in. 1.__________________________

B: Oh, sorry. I’ve been to the library.

A: What did you go there for?

B: 2__________________________________________________________

A: Well, 3 _____________________________________________________

B: It’s about 1.3 billion, one fifth of the world’s.

A: Has the government done anything to control the huge population yet?

B: Yes. 4_________________________________________________and it has worked well in controlling the population growth for many years.

A: Really? However, the population problem is still serious in China, isn’t it?

B: Yes, it is. Oh! 5 _________________________________________Let’s go to the classroom.

Hurry. Let’s go.

A.  A. What’s the population of China? 

B.  B. Where have you been?

C.  C.What’s wrong?

D.  D. The government has carries out the one-child policy.

E.  E. There goes the bell.

F.  F. I went there to look up some information about China’s population.

G.  G.I borrowed some story books.