Output is now six times _____ it was before liberation.(A) that (B) which (C) what (D) of which并请说明依据,

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Outputisnowsixtimes_____itwasbeforeliberation.(A)that(B)which(C)what(D)ofwhich并请说明依据,Outputisnowsixt

Output is now six times _____ it was before liberation.(A) that (B) which (C) what (D) of which并请说明依据,
Output is now six times _____ it was before liberation.
(A) that (B) which (C) what (D) of which
并请说明依据,

Output is now six times _____ it was before liberation.(A) that (B) which (C) what (D) of which并请说明依据,
首先排除BD 因为这句话不是定语从句然后看从句缺少表语既能引导从句又能在从句中做成分的只能是C

C
what 做后半句中的宾语
个人觉得应该还要在前面加个as,读起来顺一点.