問題詳情

6. Susan: Do you know you have talked on the phone? Aren’t you thirsty?Walter: Oh, come on! I’ve only talked for thirty minutes!
(A) how old
(B) how often
(C) how many
(D) how long

參考答案

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