单项选择题

The best title for this passage might be ______.

A．Biotechnology—Another Green Revolution.
B．Biotechnology—Hope and Concerns
C．Soybean—the Future Dinner Food for Americans
D．Scientific Research in Agriculture

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单项选择题

What's the main idea of the last paragraph

A．Crops begin infiltrating our food supply.
B．Maybe the application of biotechnology will cause environmental problems as well as bring effects to human health.
C．The application of biotechnology is also questioned by some other people.
D．The application of biotechnology will bring enormous business to America.

单项选择题

What is the main purpose of the first green revolution in America

A．To crossbreed the related plants.
B．To add the desirable traits to the plants.
C．To realize the green revolution in three decades.
D．To make the high-yield crops thrive.