________the door than somebody started knocking o

When you ______ at the door, I ______ some washing.A、knocked; didB、was knowcking; didC、k

I was about to fall asleep______there was a knock at the door.A．asB．whileC．thenD．when

The father went to the door in______to a knock from outside.A．answerB．difficultyC．regardD．

I _________ （watch) TV when someone knocked at the door．

She _____ go to bed when someone knocked at the door .A.was about toB.is about toC.was

No sooner had he sat down to lunch ______. there was a knock at the door.A.whenB.thatC.asD