1. 听对话，回答小题。

Where did you go during your vacation?<br />I went back to my hometown.<br />It has been 15 years since I left there.<br />It has changed a lot.<br />What does your hometown look like now?<br />It's very different now.<br />There is a big river in front of the village.<br />I remember the water was clean when I was young.<br />My friends and I usually went swimming in it.<br />But now it has become very dirty.<br />What happened?<br />A factory was built near the river a few years ago.<br />It's always pouring dirty water into the river.<br />And people throw lots of rubbish into it too.<br />That's terrible.<br />Yes, I am going to write a letter about it to the newspapers.<br />I hope they can call on people to do something for it.<br />They should play a part in protecting the environment.

1. （1）  How long has the woman been away from her hometown?

   A . For ten years. B . For fifteen years. C . For twenty years.
3. （2）  Which of the following doesn't make the river dirty?

   A . Children swim in it. B . People throw rubbish into it. C . A factory pours dirty water into it.
5. （3）  What will the woman do to protect the river?

   A . Clean it every day. B . Write a letter to the newspapers. C . Stop throwing rubbish into the river.