题目选项分析

From the 60`s to the 90`s, each decade saw more oil consumed than in previous human history; for instance, in the 70`s, the US used double the amount as they did in the 60`s, in the 80`s double the amount as they did in the 70`s, and so on.

From the 60`s to the 90`s, each decade saw more oil consumed than in previous human history; for instance, in the 70`s, the US used twice as much as it did in the 60`s, in the 80`s twice as much as it did in the 70`s, and so on.