C. They are less happy than 20 years ago.

【答案】18. A 19. B 20. C

【解析】

此题为听力题，解析略。

【18题详解】

此题为听力题，解析略。

【19题详解】

此题为听力题，解析略。

【20题详解】

此题为听力题，解析略。

第二部分 知识运用(共二节，满分60分)

第一节阅读理解(共20小题; 每小题2分，满分40分)

阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

　　This all started a few months ago, when I had a dull pain in the back of my mouth, around where one of my wisdom teeth was supposed to be coming in. I thought it was a pain that I could live with for a while.

　　However, during the next few weeks, the pain became more intense, spreading to my teeth, gums and jaw. I was told I had seven wisdom teeth.

　　Yes, you read that correctly, seven - three more than a normal person. My first reaction when I heard was to laugh. It's just my luck. My mouth wanted to do more work than it had to.

　　Focusing on the positive, one of the great things about having extra teeth is watching people's reactions when they find out. So far, I haven't grown tired of repeating myself.

　　The extra teeth are also a good excuse for me being tongue-tied. I can now blame it on my overcrowded mouth rather than my slow brain.

Of course, with wisdom teeth come the intellect jokes. My parents say my intelligence comes from my extra teeth and not my hard work. My friends agree that