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

答案：登入後查看
統計： A(34), B(77), C(199), D(183), E(0) #537078

詳解 (共 2 筆)

#1214805
debris 殘骸 (不可數)
23
0
#2140044
不可數名詞通常都視為單數
(共 14 字，隱藏中）
前往觀看
10
0