A man wanted to prove to a group of alcoholics the effect of alcohol on human body systems. He displayed two jars in front of the group, one containing water and the other containing alcohol, __16__ a very healthy worm. He said to the audience: “This jar contains water.” Then he dropped the worm in the jar and said, “Please watch the reaction.” The group watched closely __17__ the worm floated in the jar, dangling and swimming. The man then took the worm out of the first jar and put it in the second jar __18__ contained alcohol and said to the audience, “Now watch the reaction.” The group saw the worm go down into the water and soon begin to struggle for __19__. Right there and then every one in the group witnessed the worm shrinking and disintegrating. Then it died. The man turned round and asked the audience, “What would you all say to this?” After a long silence, someone from the rear __20__ and said, “I can see that if I drink alcohol, there will be no more worms in my body.”
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