When______at the door, she was given a warm welcome.A．appearsB．appearingC．to appearD．appea

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

When no one answered the door, she_____through the window to see if anyone was there.A．gla

Maggie ____the floor when she _____the door bell ring. A：was sweeping … heard B：swept …

When no one answered the door, she ______ through the window to see．if anyone was there． 见没人来开

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