__________ I CAME TO SEE HER YESTERDAY, SHE WAS READING A BOOK....

23. - 3 DE KIEM TRA HOC KY II MON ANH LOP 12 VA DAP AN THAMKHAO
Tiếng Anh 3 DE KIEM TRA HOC KY II MON ANH LOP 12 VA DAP AN THAMKHAO

23. __________ I came to see her yesterday, she was reading a book.

A. Before B. After C. When D. While