IN ORDER TO AVOID BOREDOM, THE MOST IMPORTANT THING IS TO KEEP O...

30. In order to avoid boredom, the most important thing is to keep oneself ______ A. occupation B. occupational C. occupied D. preoccupiedIV. Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from 31 to 40. Health is something we tend to (31) ___ when we have it. When our body is doing well, we are hardly (32) ____ of it.But illness can come, even (33) _____ we are young. In fact, childhood has been a very susceptible time. Many diseasesattack children in particular, and people know very little (34) ______ to cure them once they struck. The result was thatmany children died. About a century ago, (35) _________, scientists found out about germs, and then everythingchanged. The (36) _____ of many diseases was found, and cures were developed. As this medical discovery spread, theworld became (37) ______ safer for children. The result is that (38) _________ a hundred years ago, the average manlived for 35 years, nowadays, in many areas of the world, people can (39) ______ to live for 75 years. And what do weexpect by the year 2020 ? Undoubtedly, medical science will continue to (40) ______. Some people will be able to avoidmedical problems that are unavoidable today.