Was it 8o'clock -----you heard someone------at the door

Was it 8o'clock -----you heard someone------at the door was it 8 o'clock _____you heard someone _____ at the door? Was it8o'clock( )you heard someone ( )at the door. It was almost midnight ( ) she heard someone ( ) at the door She was cocking when she heard someone ( )knock at the door WHEN I WAS READING I HEARD SOMEONE -----(KNOCK)AT THE DOOR "Did you heard someone knocking at the door?"为什么要用at? have you heard someone knock at the door?为什么是knock,不是knoking There was a knock at the door.It was the second time someone --It was 3'o clock ( )we arrived at the village. it was at 8 o' clock yesterday evening _____ the electricity 英语翻译It was ten o’clock at night,and the last bus _1_ at the