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题库 / Prep2007E2-SC-96
There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels: more than ten times as much energy is generated through wind power now than it was in 1990.
generated through wind power now than it was
generated through wind power now as it was
generated through wind power now as was the case
now generated through wind power as it was
now generated through wind power than was the case
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1. it属于准确指代，即it指代的energy就是前句说的more than ten times as much energy，然而这里指的是两个不同的energy，而不是同一个energy，所以要用was the case来代替。it的前置词是无意义的，所有使用it的都是错误的选项。
2.只能用the case概括，C选项是一个倒装：the case was in 1990
3.as……as结构
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