通读下面短文,掌握其大意,然后从31-4 5各题所给的四个选项中选出一个最佳答案。 

Miners work under the earth to collect coal. They have 31 jobs because sometimes the earth sinks or falls apart (into pieces). When this happens, miners are 32 underground. They are covered with earth and rocks. They will die 33 they don' t have air to breathe , food to eat, or water to drink. They cannot live 34 any of these things for long, but 35 is the most important. It is difficult to find out where the miners are and    36   them in time.

Trapped miners dream of being   37   and don't give up.

In July 2002, nine   38   went to work in California.  All of a sudden, there was a terrible accident. A wall broke apart and water flooded the   39   where the miners

were working.  The water came   40   to their necks. At first, the miners shouted,__

41 no one could hear them. 42 , people on the surface(地表)found out where the miners were and dug a breathing hole. Later, they gave them 43 from their fami­lies, which told them to hold on and never lose heart. Many people 44 helping to save them. After several days' hard work, they brought the tired miners to the sur­face _45_.

31.  A.  easy       B.  safe    C.  interesting,      D.  dangerous

32.  A. lifted       B.  sent   C.  trapped        D.  taken

33.  A. so         B. if      C. though         D. before

34.  A.  without     B.  on     C.  by        D.  with

35.  A,  the first     B.  the second      C.  the third    D.  the last

36.  A. leave       B. call     C.  reach      D. catch

37.  A.  busy  .     B. rich     C. free      D. tired

38.  A. officers     B.  miners   C. doctors        D. drivers

39.  A.  place       B.  farm    C.  home       D.  hospital

40.  A.  down      B. up       C.  back       D. out

41.  A.  or         B.  when     C.  until      D.  but

42.  A.  Especially   B.  Unluckily       C. Luckily   D.  Quietly

43.  A.  food       B.  messages    C.  drinks    D.  chances

44.  A,  put off     B. gave up     C.  took part in     D. were tired of

45.  A.  alive       B.  dead      C.  active    D.  strong

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