问题详情:
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
【回答】
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。
知识点:动词时态
题型:选择题