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
【小题1】What causes waves?

When your school doesn’t have a bus, and you live too far away to walk? How do you go to school?  “Let’s carpool! ”most US middle school students will get that cool idea. Carpooling is a group of people sharing the responsibility(责任) of driving to school in the morning. There are usually four or five kids in a carpool and their parents take turns driving the kids in their cars.It might be the kids’ first experience with real teamwork. Teamwork is really important in the carpool because nobody wants to make everyone else late. It’s a great lesson in resposibility.

Carpooling is coming into fashion everywhere now. You can find lots of informations of carpooling on the internet. Carpooling is cool! Why?
It’s good for the environment. In today’s culture of everyone needing to try their best to protect our environment, carpooling is one of the best ways. By taking 3 cars off the road, the pollution can be cut a little. Take that over a town, a city, a state, a country and think about how much less pollution is going to be in the air over the course of even one year.
Gas(汽油) now is much more expensive than it used to and if you need to watch the cents(美分), then it’s possible that carpooling could be the answer to your prayers. Even if you have to use your car once a week instead of two, that’s one round trip of gas you’re saving. So carpooling helps you save money.
Carpooling is a great way of getting to know people better. If you’re carpooling grade school kids, then you’ll find that slowly you’ll get to know your child’s peers(同龄人) and friends better. It's a great opportunity to meet people while saving the environment and your money. 
【小题1】The word “carpool” means         .
A. 合伙用车                B. 共同租车             C. 让人搭车
【小题2】One of        drives the car in a carpool of middle school students.
A. their teachers              B. the students           C. their parents
【小题3】If you carpool with two persons to work every day,      will be taken off the road every day.
A. no car                   B.one car               C. two cars
【小题4】There are        advantages of carpooling mentioned in this passage.
A. three                    B. four                  C. five
【小题5】We can know from the passage that carpooling          .
A. is much more convenient than taking the school bus.
B. can help you save the money because you use your car less.
C. isn’t a good means to understand people better.

Do you remember who gets angry because you forget to tidy up your room before going out? Do you remember who feels ?? ? ?? with your dress from head to feet? This person is ?? ? ?? your boss nor your friend. It’s funny that you have to ?? ? ?? to her even though you sometimes don’t like to hear anything she has said. It’s our mother, a great ?? ? ?? in the world to us.

I always ?? ? ?? my mother if we have a “long time no see”. But this kind of missing is always quieted down by ?? ? ?? because I come back home for comfort and ?? ? ?? but mum always puts more pressure on me. Of course, I know she? ?? ? ?? about me too much and just has a lot of words to tell me. But the ?? ? ?? turns to be pressure. On the other hand, I hurt her and make her feel lonely even though I am ?? ? ?? her. Then what can we do? This problem is really hard to deal with. I think not ?? ? ?? I have this problem. Here are my ideas. When we find there are some unhappy things going to ?? ? ?? , shall we just stop for 30 ?? ? ?? ? Give me a chance to rest in your arms and we sing a childish song together just like when I was ?? ? ?? ? I need your love indeed but without telling me to do as you wish me to. And then let’s go out for a walk hand in hand. Tell me what’s in your ?? ? ?? gently and slowly. I will feel better if you don’t just pour them out.

1.A. dissatisfied????????????? ????????????? B. uncertain????????????? ????????????? C. untrue????????????? ????????????? ????????????? D. dishonest

2.A. never????????????? ????????????? ????????????? B. either????????????? ????????????? ????????????? C. neither????????????? ????????????? ????????????? D. none

3.A. belong????????????? ????????????? ????????????? B. listen????????????? ????????????? ????????????? C. change????????????? ????????????? ????????????? D. follow

4.A. advisor????????????? ????????????? ????????????? B. teacher????????????? ????????????? C. instructor????????????? ????????????? D. woman

5.A. write????????????? ????????????? ????????????? B. miss????????????? ????????????? ????????????? C. love????????????? ????????????? ????????????? D. cheer

6.A. arguments????????????? ????????????? B. works????????????? ????????????? ????????????? C. helps????????????? ????????????? ????????????? D. talks

7.A. money????????????? ????????????? ????????????? B. support????????????? ????????????? C. relaxation????????????? ????????????? D. advice

8.A. thinks????????????? ????????????? ????????????? B. worries????????????? ????????????? C. plans????????????? ????????????? ????????????? D. manages

9.A. description????????????? ????????????? B. condition????????????? ????????????? C. care????????????? ????????????? ????????????? D. mind

10.A. against????????????? ????????????? ????????????? B. beyond????????????? ????????????? C. among????????????? ????????????? ????????????? D. beside

11.A. only????????????? ????????????? ????????????? B. myself????????????? ????????????? ????????????? C. alone????????????? ????????????? ????????????? D. except

12.A. break????????????? ????????????? ????????????? B. happen????????????? ????????????? C. discover????????????? ????????????? D. appear

13.A. hours????????????? ????????????? ????????????? B. days????????????? ????????????? ????????????? C. seconds????????????? ????????????? D. weeks

14.A. stronger????????????? ????????????? ??? B. younger????????????? ????????????? C. cooler????????????? ????????????? ????????????? D. cleverer

15.A. heart????????????? ????????????? ????????????? B. pocket????????????? ????????????? ????????????? C. diary????????????? ????????????? ????????????? D. life

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?

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

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?

4.Where can we find this passage?