問題詳情:
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 考查句子的時態和語態。本題是一個由how引導的賓語從句,作knows的賓語。由從句中的ago可知該賓語從句應該用一般過去時,因此C、D兩項排除;由and可知兩處空格之間是並列的關係,再根據句意判斷出應該用被動語態,因此B項排除。故選A。
知識點:動詞時態
題型:選擇題