阿摩線上測驗
22. As a sales representative, Peter has been demonstrating the new product _____ 10 o’clock this morning.
(A) at
(B) since
(C) for
(D) when
答案：登入後查看
統計： A(645), B(669), C(71), D(35), E(0) #3021390
統計： A(645), B(669), C(71), D(35), E(0) #3021390
詳解 (共 2 筆)
許郁羚
#5989668
since +時間點
for +一段時間
28
0
