题目内容
---Look! A book is on the floor .Whose is it?
---It____be Rick’s.It has his name on it.
A. mustn’t B. can’t C. must D. need
练习册系列答案
相关题目
题目内容
---Look! A book is on the floor .Whose is it?
---It____be Rick’s.It has his name on it.
A. mustn’t B. can’t C. must D. need