Doctors claim that old people are not likely to ________ Parkinson's disease, as long as the brain ________ enough exercise．A.suffer，givesB.be suffered，is givenC.suffer，is givenD.be suffered，gives
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C解析这句句子的意思是“医生认为如果让大脑得到足够的锻炼，老人们就不容易得帕金森氏病。”suffer虽然是一个及物动词，但是不能用于被动语态。