阿摩線上測驗
21. April Fool’s Day is a day _____ people sometimes play tricks on friends.
(A) where
(B) which
(C) when
(D) how
答案：登入後查看
統計： A(62), B(594), C(996), D(101), E(0) #2996048
統計： A(62), B(594), C(996), D(101), E(0) #2996048
