单项选择题

The main point of this text is that ______.

A．pesticides are dangerous and their uses need to be reevaluated
B．children suffer most from the effects of pesticides
C．schools are most responsible for pesticide-related illnesses
D．pesticides should be eliminated everywhere

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单项选择题Children are more likely than adults to suffer the negative effects of pesticides because ______.

A．children absorb more pesticides than adults, proportionally
B．pesticides are used more in areas with children
C．the pesticides used in schools are more dangerous than other pesticides
D．adults know more about pesticides than children

单项选择题The citing of dangerous effects of pesticides on laboratory animals in paragraph 3 is used to suggest that ______.

A．scientists are also concerned with the effects of pesticides on animals
B．cancer is the worst effect of the pesticides
C．most or all of the dangerous effects of pesticides are now known
D．the chemicals may also cause these effects in humans