1. Scientists are still not in a position to prove ______ that smoking actually causes life-shortening diseases. ABSOLUTE
2. The _____ rate from all types of bites from rabid animal has dropped considerably. MORTAL
3 The most common _____ in Western diets today are those of vitamins. DEFICIENT
4. It is difficult to say how many people the earth can support, but it will help everyone if we can limit population growth before serious _____ develops. SHORT
5. One of the major _____ of researcher into human health problem is the difficulty of isolating particular, individual factors from the complex human enviroment. DIFFICULT

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