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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
B选项的问题也是比较对象不是一类，比较的是small cars和they were。另外they是指上文提及的东西，放在这里变成谈及的small cars和这些cars在历史上的比较，显然语义也不正确
D选项的问题是their的指代不清楚，their可以指的是前面的cars也可以是manufacturers
E选项的问题是比较对象不是一类，比较的是small cars和 time in history；另外前面的more+adj+daj有歧义，到底是更多的车，而这些车是经济省油的还是更经济省油的小车？
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