2 là the children were singing songs this time ạ em ghi thiếu
1. Nam has been written a letter for a month.
2. Songs were being sung by the children this time.
3. A new bike is going to be bought by my brother tomorrow.
1.A letter has been written for a month.
2.Songs were being sung by the children this time.
3.A new bike is going to be bought by my brother tomorrow.