17.Under what condition will sharks attack humans?
A) When swimmers invade their area. B) When they grow big enough.
C) When they are stimulated by humans. D) When they have several hundred teeth.
正确答案为 C 你没有作答。 解析：
音频中提到鲨鱼只有受到刺激时才会发起攻击（...a shark needs to be stimulated in order to attack），由此可以得出，鲨鱼在受到刺激后才会对人类发起攻击，所以选C。
18.According to the speaker, which of the following is NOT true about sharks?
A) Some sharks can be held in the palm of the hand. B) Sharks possess extremely sharp teeth used for cutting. C) There are more than 300 species of sharks.
D) The largest types are not necessarily the dangerous ones.
正确答案为 B 你没有作答。 解析：
音频中提到但是，很多其他种类的鲨鱼把牙齿更多地用来抓住东西而不是咬开它们（Many other types of sharks, however, have teeth more adapted for grabbing and holding than for cutting），因此，选项B中的表述是错误的，所以选B。 Script
Foods can go bad if they get too warm. But for many of the world's poor, finding a good way to keep food cool is difficult. Refrigerators are costly and they need electricity.
But in 1995 a teacher named Mohammed Bah Abba found a solution. He developed the \smaller pot is placed inside a larger one.
The space between the two pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A wet cloth covers the whole cooling system. Water in the sand between the two pots changes into steam and goes into the air through the surface of the larger pot, where drier outside air is moving. This evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful bacteria. Some foods can be kept fresh this way for several weeks.
People throughout Nigeria began using the invention. And it became popular with farmers in other African countries. Mohammed Bah Abba personally financed the first 5,000 pot-in-pot systems for his own community and five villages nearby.
In 2000, the Rolex Watch Company honored him with the Rolex Award for Enterprise. This award recognizes people trying to develop projects aimed at improving human knowledge and well-being.
19.What fills in the space between the two pots?
A) Clay. B) Wet sand. C) Wet cloth. D) Water.
正确答案为 B 你没有作答。 解析：
音频中提到两个罐子之间的空隙用湿的沙子填满（The space between the two pots is filled with wet sand），由此不难得出答案，所以选B。
20.How does the cooling system keep food from spoiling?
A) Water in the pots helps reduce the temperature.
B) The water loss in the sand helps reduce the temperature.
C) The cool water in the inner pot helps keep food safe from bacteria. D) The pots are sealed to keep food safe from bacteria.
正确答案为 B 你没有作答。 解析：
音频中在介绍这个制冷系统时提到两个罐子之间的沙子的水分变成蒸汽，通过大一点的罐子表面进入到空气中，其表面干燥的空气在流动。这个蒸发过程使温度降低了几度（Water in the sand between the two pots changes into steam and goes into the air through the surface of the larger pot, where drier outside air is moving. This evaporation process creates a drop in temperature of several degrees），由此可以得出，沙子中水分的流失有助于降低温度，所以选B。
21.Why was Mohammed Bah Abba honored with the Rolex Award for Enterprise?
A) Because he personally financed 5,000 pot-in-pot systems for others. B) Because his pot-in-pot system is more convenient than refrigerator.
C) Because his invention contributes to the improvement of people's life in some areas. D) Because the pot-in-pot system is popular in many African countries.
正确答案为 C 你没有作答。 解析：
音频中提到该奖项授予那些致力于研究提高人类知识和生活质量项目的人们（This award recognizes people trying to develop projects aimed at improving human knowledge and well-being），由此可以得出，该奖项授予Mohammed Bah Abba是因为他的发明在某些方面提高了人们的生活质量，所以选C。
Script
The British usually expect one or two snowfalls each year, but the amount of snow rarely affects everyday life. However, this week Britain has had the worst snow it has seen in around 18 years. Some places had more than 30 cm in a day.
The bad weather caused severe damage. More than 3,000 schools had to close as teachers and pupils were unable to get to school. School children weren't too unhappy about it though as they headed out to play in the snow, building snowmen, having snowball fights and skiing.
In London, bus services were withdrawn for a day and tubes and trains were cancelled. Major motorways in the country had to close.
Anyone wanting to leave the country had problems too. All the UK's major airports were closed because of the amount of snow. Hundreds of flights were cancelled leaving some passengers waiting at airports.
So why is the UK so ill-prepared for snow? The mayor of London, Boris Johnson, explained that there aren't enough snow-ploughs and gritters and it doesn't make sense to buy such equipment when it snows so infrequently.
The southeast of England was the hardest hit at the beginning of the week but the snow is now moving northwards where the chaos continues.
22.What's the severe damage caused by the snow?
A) Some places had more than 13cm snowfall in a day. B) It's the worst snow in around eight years. C) More than 3,000 schools had to close. D) Some of the UK's major airports were closed.
正确答案为 C 你没有作答。 解析：
音频中在谈及大雪给伦敦造成的危害时提到恶劣的天气造成了严重损失。由于老师和学生到不了学校，3000多所学校不得不停课（The bad weather caused severe damage. More than 3,000 schools had to close as teachers and pupils were unable to get to school），由此不难得出答案，所以选C。 23.Who were not affected by the snow emotionally?
A) Teachers. B) School children. C) Social workers. D) Passengers
正确答案为 B 你没有作答。
解析：
音频中提到学校的孩子们却没有感到难过，因为他们能去雪中玩耍、堆雪人、打雪仗和滑雪（School children weren't too unhappy about it though as they headed out to play in the snow, building snowmen, having snowball fights and skiing），由此不难得出答案，所以选B。 24.Why was all the traffic held up?
A) Because there aren't enough equipment to solve problems arising from heavy snowfalls. B) Because it snows frequently in the UK.
C) Because the mayor of London was indifferent to the problems caused by heavy snowfalls. D) Because many children went out to play in the snow.
正确答案为 A 你没有作答。 解析：
音频中伦敦的市长解释了所有交通都延误的原因，没有足够的铲雪机和铺砂机，由于不经常下雪，买这些设备没什么意义（The mayor of London, Boris Johnson, explained that there aren't enough snow-ploughs and gritters and it doesn't make sense to buy such equipment when it snows so infrequently），由此可以得出，所有交通延误是因为没有足够的设备去解决大雪造成的问题，所以选A。 25.Where was worst hit in the UK?
A) The south of England. B) The north of England. C) The southeast of England. D) The northwest of England.
正确答案为 C 你没有作答。 解析：
音频中提到，本周伊始，英格兰的东南部是重灾区（The southeast of England was the hardest hit at the beginning of the week...），由此不难得出答案，所以选C。
Section C Dictation
Directions：In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks with the exact words you have just heard. Finally, when the passage is read for the third time, you should check what you have written.
本题得分：--/10分
Script
If your life feels like it is (26)lacking the power that you want and the motivation that you need, sometimes all you have to do is (27)shift your point