“The door was open.” - “It _____________ been open...

Câu hỏi: “The door was open.” - “It _____________ been open. I had locked it myself and the key was in my pocket.”

A mustn’t have

B must have    

C can’t have 

D shouldn’t have

Câu hỏi trên thuộc đề trắc nghiệm

- Động từ khuyết thiếu - Có lời giải chi tiết