Nooneknowshowthehugerocks

来源：语文精选馆 2.41W

No one knows how the huge rocks _______ and _______ without our modern machines

eight hundred years ago.

A. were cut; moved B. were cut; move

C. are cut; moving D. are cut; moved

A 考查句子的时态和语态。本题是一个由how引导的宾语从句，作knows的宾语。由从句中的ago可知该宾语从句应该用一般过去时，因此C、D两项排除；由and可知两处空格之间是并列的关系，再根据句意判断出应该用被动语态，因此B项排除。故选A。