阿摩線上測驗
6. Normally, you will get a lower price if you purchase products _____, instead of one at a time.
(A) at once
(B) in bulk
(C) at large
(D) in time
答案：登入後查看
統計： A(12), B(65), C(57), D(15), E(0) #3426335
統計： A(12), B(65), C(57), D(15), E(0) #3426335
