阿摩線上測驗
23. The old man saw his grandson ___ with a dog in the yard.
(A) playing
(B) plays
(C) to play
(D) played
答案：登入後查看
統計： A(282), B(26), C(20), D(42), E(0) #2158998
統計： A(282), B(26), C(20), D(42), E(0) #2158998
