2. Why do we use the weather satellites to take pictures of the atmosphere? Because __________.

A. the weather satellites can do it easily　　　　　　 B. clouds form there

C. the weather forms there　　　　　　　　　　　　 D. the pictures can forecast the weather

1. Satellites travel _____________.

A. in space　　　　　　　　　　　　　　　 　B. in the atmosphere

C. above the ground　　　 　　　　　　D. above space

5. Which of the following is the best title for the passage?

A. Bees Love Blue　　　　　　　　　　　　　 　B. Bees Love Syrup

C. Bees, Color and Syrup　　　　　　　　　 　D. Can Bees See Color?

Keys: 1－5 BCBBD　

(十二)

Now satellites are helping to forecast(预报)the weather. They are in space, and they can reach any part of the world. The satellites take pictures of the atmosphere(大气), because this is where the weather forms(形成). They send these pictures to the weather stations. So meteorologists(气象学家)can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change.

Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare(比较)them with earlier ones. Perhaps they may find that the clouds have changed during the last few hours. This may mean that the weather on the ground may soon change, too. In their next weather forecast, the meteorologists can say this.

So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may be able to forecast the weather for a week or more ahead(提前).

4. The experiment has proved(证明)that bees ________.

A. cannot see colors　　　　　 　B. can see colors

C. can not see blue　　　　 　　　D. cannot see red

3. During Step 2 of the experiment, the bees go to ________.

A. the blue card with syrup on it　　　　　　 B. the new blue card with no syrup on it

C. the empty space where the original(原先的)blue card was

D. the new blue card with syrup on it on the left of the red card

2. If Picture 1 below shows the table top during Step 1 of the experiment, which of A, B, C, D in Picture 2 shows the table top during Step 2?

Picture 2

1. How many cards do you need to prepare for the experiment?

A. Two: one blue and one red　　　　　　 B. Three: two blue and one red

C. Three: one blue and two red　　　　　 D. Four: two blue and two red

5. Father Christmas comes into the house through the ________.

A. chimney　　 　　B. back door　　 C. front door　 　 D. window.

KEY: DBACA

(十一)

To find out whether bees(蜜蜂)can see colours, the following experiment is made. A round table is put in a garden, and on the table is a piece of blue cardboard(硬纸版)with a drop of syrup(糖浆)on it. After a short time, bees come to the syrup. The bees then fly to their hive(蜂房)and give the syrup to other bees in the hive. Then they return to the feeding-place which they have found. After a while, the blue cardboard with the syrup on it is taken away. Instead of this card, a blue card is now put on the left side of the first feeding-place and a red card to its right. These new cards have no syrup on them. Very soon bees arrive again, and fly straight to the blue card. None go to the red card.

Picture 1

4. When the children are older, they __________.

A. know that Father Christmas is real

B. ask their mother to fill their stockings with presents

C. know that Father Christmas is really their father

D. know that Father Christmas is really their friend

3. When the children were very young, __________.

A. they didn't know who Father Christmas was

B. they knew that Father Christmas wasn't real

C. they thought their father was Father Christmas

D. they knew who put the presents into their stockings