单项选择题

Questions22 and 23 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news. The artist named Wyland is now ______.

A．saving the whales in the ocean
B．painting giant outdoor murals
C．teaching people about nature
D．celebrating the environment
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单项选择题
Why did the resistance of insects to man-made insecticides develop so rapidly
A．Because farmers use less insecticides now.
B．Because farmers have been using insecticides for many years.
C．Because insects arc using the mechanisms against poisons produced by plants to deal with insecticides.
D．Because insects have been eating plants for many million years.
单项选择题
A．HoweverB．AndC．ThereforeD．So
A．However
B．And
C．Therefore
D．So
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