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题库 / Prep2007E2-SC-131
Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.
small cars more fuel-efficient now than at any time in their
small cars that are more fuel-efficient than they were at any time in their
small cars that are more fuel-efficient than those at any other time in
more fuel-efficient small cars than those at any other time in their
more fuel-efficient small cars now than at any time in
请看讲解视频
A.比较对象为small cars和in their history不可比；
B.they指代前面提到的相同的事物，但实际上比的是同类不同物，逻辑错误，且they were和small cars不可比；
C.对，比较对象可比；
D.their指代不清，可能指代manufacturer或者cars；
E.small cars和at any time不可比
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