阿摩線上測驗
61. I _________ the lesson last night, but I was too busy to do so.
(A) should have previewed
(B) should preview
(C) might preview
(D) may be previewing
答案：登入後查看
統計： A(1611), B(624), C(81), D(16), E(0) #1612899
統計： A(1611), B(624), C(81), D(16), E(0) #1612899
