問題詳情

17. A lot of debris ____________ at the site of explosion for quite a while.
(A)was left 
(B)were left 
(C)have been left 
(D)has been left

參考答案

答案:D
難度:適中0.405941
統計:A(9),B(27),C(68),D(82),E(0)

用户評論

徐天可】評論

debris 殘骸 (不可數)

Juice Wang】評論

不可數名詞通常都視為單數