阿摩線上測驗
30. Obtaining __________ is often considered as licensing, and when you have it, you have a license to use the work.
(A) permission
(B) slip
(C) ticket
(D) voucher。
答案：登入後查看
統計： A(123), B(9), C(11), D(26), E(0) #2236531
統計： A(123), B(9), C(11), D(26), E(0) #2236531
