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
B选项 that若用来指代growth,则前半部分缺少一个时间段去和后面的during...平行;根据Ron的解释,from When(名词从句)没有问题,只是跟the beginning (完美的名词)比起来欠佳。
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