17．What is the weather like today?

A．Rainy B．Snowy． C．Sunny．

18．When should the listeners get up tomorrow?

A．At 5：30 B．At 6：00． C．At 6：30．

19．What does the speaker advise the listeners NOT to take?

A．Whistles． B．Maps． C．Cameras．

20．What are the listeners most probably going to do tomorrow?

A．Go surfing． B．Go hiking． C．Go boating．

第二部分 阅读理解(共两节，满分40分)

第一节(共15小题，每小题2分，满分30分)

阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。

Teens who are changing the world

　　Teenagers are，in fact，solving the problems of today with groundbreaking inventions．

Keiana Cavé，U．S．A．

　　The largest oil slick(浮油)caused by the oil overflow occurring in the Gulf of Mexico in 2010 led to baby dolphins dying at six times the usual rate．

　　Watching the news on TV，Cavé felt that there must be some hidden environmental damage．Aged just 15，she began studying what happens to oil when it's left on the ocean's surface．The teenager discovered that when it's hit by UV rays from the sun，oil reacts to form chemicals which cause cancer．

　　Cavé has turned her work into two patents for methods of detecting the dangerous chemicals．

Wang Sunming and Li Jingpeng，China

Realizing the extent to which bacteria spread on public door handles，Wang and Li sought a material-titanium oxide(钛白粉)-that could adequately kill bacteria．However，the chemical isn't very effective unless exposed to UV rays．Since most door handles are inside buildings--beyond the reach of UV rays from the sun