Ⅲ.语法填空

　　(2017·山西大学附中月考)

　　Scientists have found that pesticides(农药) harm the ability of bees to find food. Bees must learn which flowers contain their food from the smells of the flowers. __1__ the bees do not learn which smells mean food, they will starve. Researchers in Britain found that pesticides __2__(use) by farmers and gardeners can switch off the part of a bee's brain that is responsible __3__ associating smells with food. Lead researcher Dr. Geraldine Wright said pesticides could seriously impact the __4__ (survive) of honeybee colonies. She said, “Bees that cannot learn will not be able to find food.” This also __5__(mean) beens will not pollinate(给……授粉) crops and wild plants.

　　Bee populations around the world have been declining. Scientists have searched for a long time for a reason __6__ so many bees are disappearing. This new research may be __7__ important clue. However, the British government does not want to stop the use of the pesticides that may prevent bees from learning. __8__ wants to carry out more tests to make sure pesticides are the real reason for the decrease in the number of bees. A spokeswoman from the Friends of The Earth charity said the government must act __9__(soon) rather than later. “Bee health is far too urgent to wait __10__ more research has been completed. Controls should be placed on these pesticides until bee safety can be guaranteed，” she said.

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