Wild as thesenotions may sound, every one has its advocates in the scientificcommunity as well as its striking commercial application. As two critics ofgenetic engineering, Jeremy Rifkin and Ted Howard, state in their book WhoShould Play God? Broad scale genetic engineering will probably be introduced toAmerica much the same way as assembly lines, automobiles, vaccines, computersand all the other technologies. As each new genetic advance becomes commerciallypractical, a new consumer need will be exploited and a market for the newtechnology will be created.

　　1. According to the passage, the exhaustfrom a car engine could probably be checked by

　　A. using metal-hungrymicrobes.

　　B. making use of enzymes.

　　C. adjusting the engine.

　　D. patenting new life forms.

　　2. According to the passage, which of thefollowing would worry the critics the most?

　　A. The unanticipated explosionof population.

　　B. The creation of biological solar cells.

　　C. Theaccidental spill of oil.

　　D. The unexpected release of destructivemicrobes.

　　3. Which of the following notions is NOT mentioned?

　　A.Developing a savings bank of ones organs.

　　B. Breeding soldiers for awar.

　　C. Producing people with cow-like stomachs.

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