单项选择题

Which of the following statements is true of "superweeds"

A．Superweeds could eradicate food crops.
B．Crops genetically engineered to resist pesticides could make superweeds grow high.
C．Superweeds could hinder food crops' growth.
D．Superweeds could grow between cracks.
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The author thinks that the biologists who engineer genes into plants ______ .
A．are nothing more than any other substances because they are made of molecule too
B．pay special attention to living things and their relation to their environment
C．insert the genes of one species among the genes of another and test the environment consequences
D．modify the genes of our food crops without considering the influence on the whole organism
单项选择题
According to the passage, why should parents listen respectfully to each child' s idea even if he has some rather bizarre or violent suggestions
A．Because it makes the child creative.
B．Because it' s acceptable given that he is young.
C．Because the child should be permitted to explore his own world.
D．Because it makes parents gentler approaches more acceptabl
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