阿摩線上測驗
22 Tipping is _____ across most of North America, with 15%-20% being seen as a reasonable amount.
(A) prevalent
(B) rare
(C) uncommon
(D) unusual
答案：登入後查看
統計： A(104), B(25), C(11), D(17), E(0) #3074343
統計： A(104), B(25), C(11), D(17), E(0) #3074343
