--It’s reported that young people are responsible for 60% of the traffic accidents.---Exac

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A. possible
B. probable
(答案→)C. likely
D. perhaps
解析：perhaps也许，后面不跟动词不定式。sb be likelyto do 某人有可能做某事。possible/ probable可用作先行主语it的表语,后面跟动词不定式或that从句作真实主语。句意：--据报道这些年轻人应该负60%的责任事故。--对，年轻的司机比那些老司机开的快的多。故选C。