問題詳情

11. ( ) We don’t know ____ Mark is going on a picnic with us tomorrow because he hasn’t told us hisdecision yet.
(A) that
(B) if
(C) who
(D) which

參考答案

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