to do more research in the field. Banning the experimental growth of GM plants as some protesters want simply deprives scientists of their most fruitful laboratory.(524 words)

　　1. GM crops are crops that_________

　　[A] have a super-yielding quality.

　　[B] cannot be grown with conventional methods.

　　[C] may have unknown health effects.

　　[D] have unnatural genes introduced into them.

　　2. Companies introduce GM food to the market as a solution to all these problems EXCEPT_________

　　[A] world hunger.

　　[B] environment.

　　[C] malnutrition.

　　[D] pest control.

　　3. The author suggests that the public does not accept GM food because_________

　　[A] biotech already caused problems like mad cow disease.

　　[B] GM foods are cheap to produce but dear to buy.

　　[C] the public no longer believes in scientific pronouncements.

　　[D] consumer confidence collapsed in recent food scares.

　　4. Critics of GM food argue that the pesticide-resistant genes_________

　　[A] may poison good insects and let bad insects thrive.

　　[B] may kill the plants instead of the harmful weeds.

　　[C] have benefits far outweighing the damage they might do.

　　[D] do ecological good by reducing the use of chemicals.

　　5. By presenting GM food, the author of the passage probably aims to _________

　　[A] expose its risks.

　　[B] answer various charges against it