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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
仔细看了解释和题目，应该就是几点：
1）at any time 和 at other time 把握对
2）比较对象分清。句义的意思是：现在造出的车，比汽车生产史上其它任何时候造出来的车要更省油。也就是“现在的车”和“史上其他任何时候的车”比。所以那些指代不明的，比时间的，用 they （同一批还是现在的车在过去，这没法比）而不用those（不具体指代）都不正确。
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