阿摩線上測驗
1. I can’t find my backpack, and since the last place I had it was the library,
I _________left it there.
(A) must have
(B) should have
(C) can’t have
(D) couldn’t have
答案：登入後查看
統計： A(140), B(46), C(8), D(14), E(0) #716548
統計： A(140), B(46), C(8), D(14), E(0) #716548
