单项选择题

According to Fields, all of the following are the advantages of his technique EXCEPT that ______.

A．it is environmentally friendly
B．it is safe to the people's health
C．it is more effective than pesticides against some insects
D．it is cheaper than pesticides
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单项选择题
Before the 17th century, the little people or the hidden people were ______.
A．highly respected
B．called universally as fairies
C．believed to be active at night
D．said to move about naked all the time
单项选择题
According to the passage, the little people would do all of the following EXCEPT ______.
A．steal human babies
B．steal fruit
C．kill farm animals
D．milk cows
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