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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
In general, the point of "that" and "those" is to stand for nouns without any attached modifiers/descriptions.
There's an explicit contrast with "it" and "they", which stand for a noun with all of the attached modifiers.
E.g.,
The government of Country X is more stable than it was two years ago.
"It" = "the government of country X"
It is impossible to use "it" to stand for government in general. In this context, "it" can refer only to the government of country X.
Vs.
The government of Country X is more stable than that of Country Y.
"That" = "the government". NOT the government of country X.
The whole point of comparisons, of course, is to compare two different things. So, these pronouns are extremely useful because they're designed to do exactly that-- to stand for only the parts that are actually the same.
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