单项选择题

Passage Two What is the most surprising suggestion scientists give

A．Changing the way of spraying crops.
B．Buying some outdoor insect lamps.
C．Using a combination of three insecticide.
D．Trying to attract new insects onto the crops.
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单项选择题
Merit pay attempts to pay teachers according to ______.
A．the length of working year
B．number of titles attained
C．their working performance
D．profit they made for school
填空题
C
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