tham khảo
1. Mi and Ha were talking
2. Ann and Lan were singing.
3. Phong and Nick were playing chess.
4. Mai was reading a book.
5. Nam was cleaning the board.
1. Ann and Lan were singing while Nam was cleaning the board.
(Ann và Lan đang hát trong khi Nam đang lau bảng.)
2. Phong and Nick were playing chess while Mai was reading a book.
(Phong và Nick đang chơi cờ vua trong khi Mai đang đọc sách.)
3. Ha and Mi were talking to each other.
(Hà và Mi đang nói chuyện với nhau.)