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标题: 求教语法问题 [打印本页]

作者: askfjaw 时间: 2017-11-18 12:04
标题: 求教语法问题

173.

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.

A.that the universe began in an explosive instant 10 to 20 billion years ago and has been expanding
B.that the universe had begun in an explosive instant 10 to 20 billion years ago and had been expanding
C.that the beginning of the universe was an explosive instant 10 to 20 billion years ago that has expanded
D.the beginning of the universe to have been an explosive instant 10 to 20 billion years ago that is expanding
E.the universe to have begun in an explosive instant 10 to 20 billion years ago and has been expanding
请问本题目答案为A，但是一般自然现象不是用一般现在时吗，为什么本题目用的是一般过去时

作者: Fiona09 时间: 2017-11-20 18:07
那是指不受时间限制的普遍真理和自然规律，这里明显有时间指示词——10 to 20 billion years ago，得用过去式

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