問題詳情

22.( ) For three days, the pet cat had no appetite for anything. Its owner concluded that it ______ sick.
(A)should have been
(B)must have been
(C)could not have been
(D)might not have been

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)