Read the passages and do the following exercises. （阅读并做题）

　　It is a fine day. Mary and Jack are going to the zoo. Now they are sitting on the bus. The bus is coming to the next stop. An old lady is getting on the bus. Mary and Jack both stand up. They say, “Here's a seat for you, Granny. ” “Thank you very much. It's very nice of you. ” says the old lady.

　　Answer the questions according to the passage（根据短文内容，回答问题）

1．What's the weather like?

________________________________________ .

2．Where are Mary and Jack going?

________________________________________ .

3．Where are they sitting now?

________________________________________ .

4．An old lady is getting off the bus, isn't she?

________________________________________ .

5．Why do Jack and Mary stand up?

________________________________________ .

Many years ago，there were lots of trees on earth，because summer lasted a whole year．What was the forest like? It is not difficult to see，because parts of that ancient（古老的）forest still stand．It is the rainforest．Here，even in a sunny day water drops through the leaves．

Today's largest rainforest is in South America．It covers about a million square miles．All the trees are very tall；the young trees are nearly sixty feet high．But it is not easy for some to grow higher because very little sunlight leaches them．

Many trees are about 60 to 120 feet high．Some are even taller．The tallest trees can be 200 feet high．

In this forest of tall trees，plant life is rich，animal life is rich，too．At different heights live different animals and many different noises can let you know where they are．

根据短文内容，选择最佳答案。

1．There were lots of trees on earth many years ago because of the _________．

A．cold weather          B．largest forest          C．warm weather               D．rainforest

2．A rainforest has enough _________．

A．trees                    B．rainfall（雨量）      C．forest                    D．leaves

3．There is rainforest _________．

A．only in South America                              B．only in the old days

C．in some parts of the world                          D．below the sea

4．Young trees share little sunlight because _________．

A．tall trees are above them                           B．there isn't enough sunlight

C．they needn't much sunlight                          D．it is summer the whole year

5．You can always find different animals by _________．

A．their colors                                             B．the noises they make

C．climbing the trees                                       D．watching them carefully

Cause and effect is one way to explain things that happen around us. Many things happen because something caused or influenced them to happen. Sometimes it is hard to look at a cause and find out what caused or influenced them to happen. Sometimes it is hard to look at a cause and find out what causes the effect. It may help you to start with the effect and use your reasoning(推理的) skills. Think about all the things you know that could be reasons for the effect you can see.
For example, you may see someone putting on a heavy jacket. This is the effect. To look for a cause, think to yourself, “What would take someone put on a heavy jacket?” Maybe the person is going outside into very cold weather. Maybe the person works in the penguin pen(企鹅圈养地) at Sea World. Maybe the person is going to visit an ice skating rink where the air is kept very cold. All of these things could be a cause for putting on a heavy jacket.
Now, think about a second example. The effect is a boy named Abi has to go to the head teacher’s office. What are the possible causes? Maybe he bullied(欺负) another student. Maybe he is just being picked up early. Maybe he is being given a prize!
Here is another example for you to think about its cause and effect. Cait, 13, was trying to fall asleep when her 8-year-old brother, Doug, came into her room. He looked around a bit, but seemed really out of it. Then Doug went back into the hallway and stood there looking straight up at the hall light for quite a while. Little brothers can be very strange, but this was really much too strange. Cait’s father appeared and explained that Doug was sleepwalking. What’s the cause end effect, could you tell?
根据材料内容选择最佳答案，并将其标号填入题前括号内。

1. 1.

   According to the second paragraph, which of the following is an effect?

   1. A.
      Someone puts on a heavy jacket
   2. B.
      Someone works in the penguin pen
   3. C.
      Someone will go outside into cold weather
   4. D.
      Someone will go to visit an ice skating rink
2. 2.

   Abi has to go to the head teacher’s office. Which of the following isn’t the possible cause?

   1. A.
      He bullied another student
   2. B.
      He is going shopping
   3. C.
      His is being picking up early
   4. D.
      He is being given a prize
3. 3.

   What was Doug doing when his sister Cait tried to fall asleep?

   1. A.
      He was going outside
   2. B.
      He was reading a story
   3. C.
      He was sleepwalking
   4. D.
      He was looking for his dad
4. 4.

   Which of the following is cause and effect?

   1. A.
      Tony got up and had a glass of water
   2. B.
      We came home and found him sleeping
   3. C.
      The ball was lost and a window was broken
   4. D.
      Tim was late again and his teacher got angry
5. 5.

   What is the best title for the next?

   1. A.
      Truth and lies
   2. B.
      Work and sleep
   3. C.
      Cause and effect
   4. D.
      Life and dreams

Cause and effect is one way to explain things that happen around us. Many things happen because something caused or influenced them to happen. Sometimes it is hard to look at a cause and find out what caused or influenced them to happen. Sometimes it is hard to look at a cause and find out what causes the effect. It may help you to start with the effect and use your reasoning(推理的) skills. Think about all the things you know that could be reasons for the effect you can see.

For example, you may see someone putting on a heavy jacket. This is the effect. To look for a cause, think to yourself, “What would take someone put on a heavy jacket?” Maybe the person is going outside into very cold weather. Maybe the person works in the penguin pen(企鹅圈养地) at Sea World. Maybe the person is going to visit an ice skating rink where the air is kept very cold. All of these things could be a cause for putting on a heavy jacket.

Now, think about a second example. The effect is a boy named Abi has to go to the head teacher’s office. What are the possible causes? Maybe he bullied(欺负) another student. Maybe he is just being picked up early. Maybe he is being given a prize!

Here is another example for you to think about its cause and effect. Cait, 13, was trying to fall asleep when her 8-year-old brother, Doug, came into her room. He looked around a bit, but seemed really out of it. Then Doug went back into the hallway and stood there looking straight up at the hall light for quite a while. Little brothers can be very strange, but this was really much too strange. Cait’s father appeared and explained that Doug was sleepwalking. What’s the cause end effect, could you tell?

根据材料内容选择最佳答案，并将其标号填入题前括号内。

1.According to the second paragraph, which of the following is an effect?

A．Someone puts on a heavy jacket.

B．Someone works in the penguin pen.

C．Someone will go outside into cold weather.

D．Someone will go to visit an ice skating rink.

2.Abi has to go to the head teacher’s office. Which of the following isn’t the possible cause?

A．He bullied another student.               B．He is going shopping.

C．His is being picking up early.               D．He is being given a prize.

3.What was Doug doing when his sister Cait tried to fall asleep?

A．He was going outside.                    B．He was reading a story.

C．He was sleepwalking.                     D．He was looking for his dad.

4.Which of the following is cause and effect?

A．Tony got up and had a glass of water.

B．We came home and found him sleeping.

C．The ball was lost and a window was broken.

D．Tim was late again and his teacher got angry.

5.What is the best title for the next?

A．Truth and lies                          B．Work and sleep

C．Cause and effect                        D．Life and dreams