A. It was cleaned up.

　　B. It was seriously polluted.

　　C. It became the most outstanding river.

18. How long did it take for the river to become clean?

A. A few months. B. Several years. C. A few days.

19. What can make the river clean according to the speaker?

A. Hard work.

B. Something imaginable.

C. The control of using your credit card.

20. What shall we do when facing an impossible situation?

A. Wait for something to change.

B. Imagine something outstanding.

C. Just be patient and do something.

第二部分 阅读理解（共两节， 满分30分）

第一节：阅读理解（共15小题；每小题1.5分，满分22.5分）

阅读短文，从所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

　　　　　　　　　　　　　　　　　　　A

　　Since 1904, Ravinia Festival has been Chicago's "sound of summer", a place where you can meet up with your friends, have a wonderful time and hear some of the greatest music in the world. We' ve got stars on the stage and stars in the sky, and it's all within your reach. But there's more to Ravinia than merely the world's greatest music. For as many people who walk through Ravinia's gate each summer, there are just as many ways to enjoy what we call "The Ravinia Experience". For some, it all starts with a picnic picked up along the way, greeting your friends at your favorite spot on the lawn.

　　Ravinia Dining

Whether you want to add a bottle of wine and some cheese to your picnic on the lawn or sit down to a meal, Ravinia has a wide variety of choices and we welcome you to explore them all.