阿摩線上測驗
18. While we were waiting for his coming, all of us stood at the busy corner, merely ______ at passers-by.
(A) look
(B) looked
(C) looking
(D) having looked
答案：登入後查看
統計： A(2), B(30), C(59), D(2), E(0) #628477
統計： A(2), B(30), C(59), D(2), E(0) #628477
