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课时作业21 Unit 1 Great scientists 一、单元扣点训练 Ⅰ.短语填空 1．A black car cut in ahead of me, forcing me to ________. 2．Without plenty of water, you will easily ________ thirst in the desert. 3．This essay is quite good ________ a couple of spelling mistakes. 4．There is no doubt that stress can ________ physical illness. 5．I don't think it ________ to focus only on providing basic services. 6．I wrote a letter of complaint, and the airline have promised to ________ the matter. 7．Andrew can be very badtempered ________ even though he is friendly in general. 8．A new approach to teaching languages was ________ at the meeting last week. 9．These colors will not last if they ________ the sun. 10．Scientists now ________ certain types of cancer ________ the amount of junk food that people eat. 答案 1.slow down 2.die of 3.apart from 4.lead to 5.makes sense 6.look into 7.at times 8.put forward 9.are exposed to 10.link; to Ⅱ.完成句子 1．To prevent this from happening again, he suggested ______________________(所有的水源都要经过检测). (examine) 答案 the source of all the water supplies be examined | 
