职称英语考试

试题来源：2015年职称英语理工类B级完形填空专项练习（5）
【单选题】

The Greatest Mystery of Whales

The whale is a mammal - warm-blooded, air-breathing, giving birth to its young alive, sucking them-and, like all mammals, originated on land. There are many signs of this. __1__ front flippers, used for steering and stability, are traces of feet.

Immense strength is built into the great body of the big whales, and in fact most of a whale's body is one gigantic muscle. The blue whale's pulling __2__ has been estimated at 400 horsepower. One specimen was reported to have __3__ a whaling vessel for seven hours at the __4__ of eight knots.

An enraged whale will attack a ship. A famous __5__ of this was the fate of whaler Essex, which was sunk __6__ South America early in the last century. More recently, steel ships have had their plates buckled in the same way. Sperm whales were known to __7__ the old-time whaleboats in their jaws and crush them.

The greatest mystery of whales is their diving ability. The sperm whale __8__ the bottom for his favourite food, the octopus. __9__ he is known to go as far down as 3,200 feet, where the pressure is 1,400 pounds, to the square inch. Doing __10__ he will remain submerged as long as one hour. Two feats are involved in this : storing up enough __11__(all whales are air-breathed) and withstanding the great change in pressure. Just __12__ he dose it scientists have not determined. It is believed that some of the oxygen is stored in a special system of blood vessels, rather than just held in the lungs. And __13__ that a special kind of oil in his head is some sort of compensating mechanism that automatically adjusts the internal pressure of his body. But __14__ you can't bring a live whale into the laboratory for study, no one __15__ just how these things work.

EXERCISE:

1. A)Their B)His C)Theirs D)Its

2. A)strength B)width C)height D)length

3. A)eaten B)crashed C)towed D)lifted

4. A)distance B)rate C)voyage D)sail

5. A)picture B)film C)example D)book

6. A)off the coast of B)of the coast of C0away the coast of D)in the coast of.

7. A)hit B)seize C)damage D)overturn

8. A)sink to B)rest on C)dive to D)hide on.

9. A)In that search B)Because of this C)In spite of that D)In support of this.

10. A)so B)such C)above D)the same

11. A)air B)oxygen C)energy D)heat

12. A)what B)where C)how D)when

13. A)it is believed B)he believes C)we believe D)it believes.

14. A)because of B)due to C)since D)owing to.

15. A)communicates B)knows C)hears D)develops.

试题出处：http://www.examtiku.com/shiti/6470520328.html
网考网参考答案：D、A、C、B、C、A、B、C、A、A、B、C、A、C、B
网考网解析：进入考试题库查看解析
大数据分析：根据网考网与考试题库的统计分析，该试题：
1%的考友选择了A选项
26%的考友选择了B选项
1%的考友选择了C选项
72%的考友选择了D选项
考友解析与评论：
 · 这题答案有争议，我认为选D、A、C、B、C、A、B、C、A、A、B、C、A、C、B
 · 应该是D、A、C、B、C、A、B、C、A、A、B、C、A、C、B啊
 · 像这种考试，没什么技术含量，全靠运气。