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题库 / Prep2007E2-SC-49
Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture to 1950.
Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture
Since 1990 the growth of the global economy has been more than that during 10,000 years, from when agriculture began
The growth of the global economy since 1990 exceeds that which had been for 10,000 years from the beginning of agriculture
The growth of the global economy since 1990 exceeds what it has been for 10,000 years, from when agriculture began
The growth of the global economy since 1990 exceeds what it did for the 10,000 years from the beginning of agriculture
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they, their, it都是完整指代，即指代包含了被指对象的所有修饰成分， that， one都是核心指代。
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