5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 4

This room is dirty. Someone________ in here. a. smoked b. has smoked

5/20

This room is dirty. Someone________ in here.

smoked

has smoked

had been smoking

has been smoking

Giải thích

Chọn đáp án D