Cho dạng đúng của từ trong ngoặc

dien tu thich hop trong ngoac vao o trong 1 why .............you(make)...........so much noise in the room,lan ? - we (reherse)............a play,mum. 2 he (be).............busy at the moment.but he (come) ..............to give you a helping hand as soon as he (finish) .............his work. 3. ............the childent (play) .................in the yard at the moment ? - no,they aren't.