2016届高考英语人教版一轮复习：课时作业19_高考复习指南

2016届高考英语人教版一轮复习：课时作业19

　　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.