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课时跟踪检测(三十七) Cloning .单项填空 1．(2017·江西重点中学高三联合考试)—I failed in the driving test again. Sorry to let you down. —________？ I've helped you practice enough. A．So what B．How come C．Any reason D．Why not 2．—It's reported that there's ________ big breakthrough in the cancer treatment. —If only my son could be brought back to ________ life! A．a; / B．/; a C．the; the D．a; the 3．(2017·烟台调研)It was too hard for the firefighters to get close to the burning building. All their attempts to rescue the people trapped were ________. A．in vain B．in return C．in place D．in danger 4．(2017·江苏南通第二次调研)—Could you tell me something about the virus, Dr. Smith? —Sure. It ________ via the bloodstream and causes ill health in a variety of organs. A．concentrates B．circulates C．accumulates D．accelerates 5．(2017·江西吉安模拟)Although a child, my son can resist ________ what to do and what not to do. A．being told | 
