If we find a bird nest (巢), we will have a good place of watching and knowing about birds. Birds sit on eggs and take care of their babies from April to June. Because the baby birds are too young to leave the nest, parents often go to look for food and come back in several minutes. So it is good to watch birds. When we watch birds, we'd better hide ourselves in a close place to the nest, and it's better to use binoculars (双筒望远镜).
But how do we make a bird nest? A good bird nest must be very fine, strong, thick and comfortable. If you want to make one, please follow these:
a) Each nest must have six boards (木板) for its cover and floor, for its left and right sides, and for its front and back sides. Don't make the boards too slippery (滑的).
b) Dig a small hole in the front of the nest as a "door". The "door" is big enough so birds can fly in or out easily.
c) Make sure the rainwater can't go into the nest.
d) One piece of the board should be easy to open.  
e) Don't forget to colour the nest.
【小题1】We need ______ near a bird nest if we want to watch and know about birds.

A.a good place B.some treesC.to sit on eggs D.to make a bird net
【小题2】When we're watching birds, we have to ______.
A.look after the birds more often B.use the binoculars to catch the birds
C.hide ourselves to make the birds do everything as usual D.catch the birds at last
【小题3】We should leave a hole in the front of the nest so that ______ easily.
A.we can clean the nest B.birds can fly in or out
C.we can hang it D.we can make it
【小题4】According to the text, we can make a bird nest like Picture ______ with the boards.

The Earth has warmed by about half a degree(0.50℃)over the last 100 years. It could be getting warmer on its own, but many scientists think that people are making the Earth warmer by making a greenhouse effect. The greenhouse effect is important.  Without it, the Earth would not be warm enough for us to live on. But just a little warmer than it is now could cause problems for humans, plants and animals.

Many of the things we do every day can change the Earth’s temperature by sending greenhouse gases into the air. We send greenhouse gases into the air when we watch TV, turn on lights, dry hair, play video games, wash or dry our clothes or drive cars. The rubbish from factories and homes also produces greenhouse gases.

     Even a small change in temperature can affect our weather. This can cause changes in the sea levels, the air, flooding, and our fresh water.

The change in the temperature can also cause changes in the living places for animals and plants, endangering many animals.

     Global warming is a big problem, and every little bit we do can help. We can save electricity. We can save energy in other ways such as by taking buses or walking rather than driving cars. We can recycle to reduce the rubbish and save natural resources such as trees, oil and metals. We can buy products that don’t do bad to the environment and we can turn to solar energy. Remember the little bit that you do will bring a better world.

1. Which of the following does not send greenhouse gases into the air?

A. Watching TV.                     B. Turning on a light.

C. Driving a car.                     D. Walking to school.

2. In this passage, the scientists are mainly trying to make the readers realize___________ .

A. the greenhouse effect is important

B. humans are making the earth warmer

C. the earth is getting warmer in 100 years

D. the earth could be getting warmer by itself   

3. Without the greenhouse effect,we would _____________ .

A. be safer                         B. not be able to live

C. have a cleaner earth                D. have a better world

4. The writer gives us advice on how to save energy in __________ .

A. Paragraph 2                      B. Paragraph 3     

C. Paragraph 4                      D. Paragraph 5

5. Global warming is a big problem but ___________ .

A. we can't do anything to help        B. we don't need to do anything

C. we can do something to help       D. we can do something to stop it

 

The London Olympic Games are coming soon. This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.

When you watch 3-D movies or TV, you have to wear a special pair of glasses. The 3-D glasses make the people and the things on the screen look like they are in the room with you.

3-D, means having three *dimensions: *width, height and *depth. 3-D technology is based on the way the human brain and eye work. Because the *pupils of a person’s eyes are about 6.5cm apart, when we look at something, each eye sees it from different *angle. Our eyes send the two pictures to our brain, and the brain puts them together. The small difference between the picture from the right eye and the picture from the left eye make us see depth.

While watching 2-D films, we don’t have to wear the special glasses. We see the pictures in two dimensions, each eye get the same information. This is because there is only one way of watching it.

So the aim of 3-D technology is to get a different picture into each eye of the person. It uses two film *projectors. One *projects a left eye picture and the other projects a right eye picture. When we are in the cinema, we can see different pictures in each eye at the same time with the help of the 3-D glasses.

While watching 3-D films, we feel that we are actually in the same environment as the things we are watching. However, some people are against watching 3-D films. One of the reasons is the 3-D glasses makes the screen of the film or TV look darker. It is bad for eyes. What’s more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the pictures.  

1.Paragraph 3 mainly tells us __________.

A.how we see things in 3-D                  B.how we watch the Olympic Games

C.how 3-D films are made                   D.where we watch 3-D films or TV

2.When we watch a 2-D film, each of our eyes get ________ information.

A.no               B.different          C.dark             D.the same

3.Which is the following is right according to the passage?

A.We don’t have to wear 3-D glasses if we watch games in 3-D on TV.

B.The 3-D technology is based on the way the human ear and eye work.

C.All the people can have fun watching 3-D movies or TV for a long time.

D.3-D glasses make us see different pictures in each eye at the same time.

4.Why are some people against watching 3-D films? Because ____________.

A.they make them more excited or sadder

B.3-D glasses make the screen look darker

C.3-D films make all people get headaches

D.they dislike watching the Olympic Games

 

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