When I was A（at) the grocery store, I B（realized) that the prices of C（many items) D（had b

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

I （)supper when I（)someone knocking at the door.A、made . . . HeardB、made . . .was heard

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

I was keenly delighted when I felt the ________ of the broken doll at my feet. A fra

I __________ along the street when he shouted at me.A. walkedB. was walkingC. walk

The Earth Day Groceries Project ______ .A．was inspired by a friend of Mark" s who works at