Giúp mình với ạ mình cần gấp ạ T - T 1/While Mary............(have) lunch, it.............(start) to rain. 2/ When the bell..........(ring), we..........(play) football. 3/His father..........(die) when he............(be) young 4/While she.........(cook) dinner, her husband..........(clean) the floor. 5/When the teacher........(come) into the classroom, the students.........(play)