Every year, almost 2 million Americans are injured while they're  21 work every day, 240 are killed on the job. The   22   job is cutting down trees. Being a policeman is safer than many jobs, including driving a truck, collecting garbage and   23  airplanes. One of the safest jobs is being a librarian.
The government inspects(检查) most factories and offices.  24 have to   25   fines(罚款) if their factories or offices are unsafe. In California, employers often go to prison if one of their workers is  26  because a factory didn't  27 safety measures. But President Bush cut down the number of government inspectors(检查员)  28 15 percent.   29 , many people say working is less safe now.
For women workers, the greatest danger so far is murder. Forty--two percent of all  30 who died at work were killed. Many of them work  31 clerks in stores   32 they are alone at night. Experts say they can protect themselves by putting the cash desk in full   33  .
The numbers of deaths and accidents at work don't take into  34 people who become sick from   35   that they are exposed to （暴露）at work. Doctors don't know   36 some chemicals cause illness.There are no government rules for many new chemicals.
Inspectors say employers  37 their backs on safety problems because they don't want to pay the bill for fixing them. They also say some workers don't want to complain about dangers because they may  38  their jobs.
The government should force business to improve safety. There's no   39 for workers dying or  40 in an accident that could have been prevented.
21. A. in           B. at              C. on               D. during
22. A. safest        B. most dangerous   C. easiest            D. most tiring
23. A. flying        B. making         C. doing             D. riding
24. A. Officers      B. Workers         C. Employers        D. Employees
25. A. give         B. offer            C. pay              D. buy
26. A. saved        B. hit             C. shot              D. killed
27. A. use          B.do              C. break            D. take
28. A. to           B. by              C. from             D. at
29. A. As a result    B. As              C. At last            D. Then
30. A. adults        B. youths          C. men              D. women
31. A. for          B. as              C. like               D. to
32. A. which        B. that             C. where            D. why
33. A. view         B. opinion         C. scene              D. scenery
34.A thought       B mind           C thinking            D consideration
35. A. machines     B. chemicals        C. air                D. work
36. A. because      B. when            C. whether            D. even if
37. A. do          B. turn             C. make              D. refuse
38. A. lose         B. miss             C. give up            D. save
39. A. need         B. reason           C. time              D. excuse
40. A. injuring      B. being injured      C. be injuring         D. be injured