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Somepeopleholdtheviewthatthenewmachineisadvanced,whileothersarestillskepticalwhetheritisofpracticaluse.A.withB.aboutC.forD.on

题目详情
Some people hold the view that the new machine is advanced, while others are still skeptical _____ whether it is of practical use.
A.with B.about C.for D.on
▼优质解答
答案和解析
B