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题库 / GmatLaCourse-SC-57
The widely accepted big-bang theory holds that the universe began in an explosive instant 10 to 20 billion years ago and has been expanding ever since.
that the universe began in an explosive instant 10 to 20 billion years ago and has been expanding
that the beginning of the universe was an explosive instant 10 to 20 billion years ago and the universe has been expanding
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题目分析：
(A)中in an explosive instant是状语，其修饰对象是 the universe began这个行为；(B)中an explosive instant是补语（主语的补语），其补充说明了the beginning of the universe。在逻辑上，应该是宇宙开始于一个爆炸物，而不是宇宙的开始是一个爆炸物（宇宙自己是爆炸物），答案为(A)。
instant有“瞬间”的意思，宇宙的开始是一个瞬间，好像也可以说得通额？
宇宙的开始..怎么也得是一个物体吧...不能是个时间嘛~你只能说，宇宙开始于某个瞬间。
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