Scientists have long known that nature is really a chemical factory. All living things contain chemicals that help them survive. So scientists interest in traditional medicine is not new. But it has become an urgent concern. This is because the earth s supply of natural medicines may be dropping rapidly.
  
  41  The passage indicates that ancient treatments for injury and disease were
       A  much more successful than modern ones.
       B  successful enough for humans to survive.
       C  successful in all cases.
       D  of little help to humans.
  42  Which of the following statements is NoT true?
       A  Modern medicines are now available all over the world.
       B  Many big and modern hospitals are expensive.
       C  Traditional medicines are neither mysterious nor magical.
       D  Humans have used some kinds of medicines since earliest days.
  43  It is believed by scientists that traditional medicines
       A  can cure all kinds of diseases.
       B  may cure some of todays most serious diseases.
       C  are no longer useful for modern men.
       D  are too cheap to be useful.
  44  What do the majority of the people in the world use for health care?
       A  Strange and wonderful equipment.
       B  Factory-produced chemicals.
       C  Modern medicines.
       D  plants.
  45  It can be seen from the passage that the earths supply of natural medicines
       A  may never be exhausted.
       B  may be dropping rapidly.
       C  is surprisingly big.
       D  is as rich as ever.

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