問題詳情
59. ______ appetite over the course of 24 hours may not indicate a serious concern, but after the 24hour period a pet owner should consider seeking veterinary care.
(A) Lacking of
(B) A lack of
(C) Lack
(D) Lack of
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增