Some time ago, two navy officers made a journey to the deepe

Some time ago, two navy officers made a journey to the deepest point on the earth. The two men went down seven miles to the__1__of the Pacific Ocean inside a small steel ball to find out if there are any__2__of life.
They set out early so that the ball would come to the surface in the__3__and so be easily found by the mother ship. The divers began__4__at dawn and soon afterwards the ball__5__under the surface of the water.
__6__, the temperature dropped to freezing point and the men trembled inside the ball. They kept in touch with the mother ship by telephone__7__how they felt. At a depth of 3,000 feet, the telephone stopped working and they were quite cut__8__from the outside world. At 30,000 feet, the men were shocked by a sudden loud__9__- even the smallest hole in the ball would have__10__instant death. Luckily, it was only one of the outer windows__11__had broken.
Soon afterwards, the ball__12__the soft ocean floor, raising a big cloud of "dust" made__13__different kinds of small, dead sea animals. Here, powerful lights lit up the __14__water. The men were surprised to see fish swimming just above them, quite__15__ by the very large water pressure. But they did not__16__to leave lights on for long, as the great__17__from them made the water boil. Quite__18__, the telephone began working again and the weak__19__ clear voices of the officers were heard on the mother ship. After a__20__of thirty minutes the men began their journey up, arriving three hours later.
1. A. foot          B. base         C. bottom       D. tip
2. A. marks         B. signs        C. signals       D. messages
3. A. evening        B. night       C. secret        D. daytime
4. A. diving         B. rising       C. traveling      D. preparations
5. A. disappeared    B. floated       C. threw        D. flew
6. A. In time        B. On time      C. At times      D. At one time
7. A. guiding       B. realizing      C. describing     D. imagining
8. A. down         B. over         C. off           D. out
9. A. voice         B. noise        C. explosion     D. shout
10. resulted         B. suggested     C. meant        D. saved
11. A. where        B. that          C. which        D. whose
12. A. touched      B. visited        C. attacked      D. landed
13. A. of           B. from        C. up of         D. into
14. A. green        B. blue          C. dark         D. hot
15. A. unbelieved    B. unchanged    C. uncovered     D. untroubled
16. A. use          B. need         C. dare          D. think
17. A. light         B. heat         C. pressure       D. sound
18. A. unexpected    B. uncovered    C. unknown      D. uncontrolled
19. A. or           B. and          C. but           D. either
20. A. living        B. stay          C. rest          D. break