It happened during the Second World War. A British   1  ,  called the "Nova Scotia",  was  2  more than a thousand South African  3  and Italian prisoners of war . It was a long way from Europe to South Africa. But a German submarine (潜艇) was  4  in the sea when the "Nova Scotia" appeared. 

The submarine  5  the "Nova Scotia" to the bottom of the sea. Many men were  6  at once. Many others were badly  7  . But hundreds were alive. They were not greatly  8  . The sea was calm and   9  ,  and they were   10  a ship would find them in the morning. A ship did find them,  but it   11  only 183 men. The sharks(鲨鱼) had taken the rest.

Thirty years later,  one of the living men said,  "I was in a raft(救生筏). There were men all  12  me in the water. They were   13  ,  or holding onto pieces of wood. Suddenly I heard a   14  . It came from a man who was a few hundred metres  15  . He threw his arms in the air. Then he   16  in the water. He never came   17   again. That was only the beginning. The sharks had smelled the blood of the dead and dying men.  18  seemed to be hundreds of them. Man after man gave a  19  shout and then disappeared. I even saw sharks attack men on the rafts. They   20   right out of the water.

1. A. train           B. ship            C. hospital       D. school

2. A. carrying        B. gathering       C. organizing     D. training

3. A. students        B. teachers        C. patients       D. soldiers

4. A. passing         B. blocking        C. waiting        D. attacking

5. A. took            B. brought         C. led            D. sent

6. A. killed          B. saved           C. afraid         D. frightened

7. A. beat            B. knocked         C. hurt           D. damaged

8. A. hurried         B. worried         C. suffered       D. uncomfortable

9. A. warm            B. cold            C. silent         D. deep

10. A. talking        B. thinking        C. searching      D. expecting

11. A. held           B. found           C. saved          D. helped

12. A. comforted      B. envied          C. round          D. below

13. A. sinking        B. swimming        C. fighting       D. escaping

14. A. explosion      B. noise           C. laughter       D. shout

15. A. away           B. off             C. far            D. distance

16. A. dived          B. disappeared     C. drowned        D. fell

17. A. back           B. on              C. up             D. over

18. A. Here           B. There           C. Then           D. It

19. A. short          B. loud            C. dull           D. terrible

20. A. jumped         B. swam            C. flew           D. floated

KEYS: 1-5 BADCD  6-10 ACBAD  11-15 CCBDA   16-20 BCBDA