問題詳情

4. These students have spent many hours____ on the line to see Mayday.
(A) waiting 
(B) wait 
(C) on waiting 
(D) to wait

參考答案

答案:A
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

內容推薦

內容推薦