問題詳情

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

參考答案

答案：C
難度：適中0.627119
統計：A(0),B(15),C(37),D(2),E(0)