______ , a car knocked him down.A．As he walked homeB．Having walked homeC．While walking hom

The reason why the end of the bidding is called "knocking down" is that _________.A．the au

The end of the bidding is called "knocking down" because ______.A．the auctioneer knocks on

______in thought, he was almost knocked over by a car in front of him.A．To loseB．LostC．Hav

___________, a car knocked him down.A. While crossing the streetC. While the boy was cro

The little child was knocked down by a car and badly______ yesterday afternoon.A．injuredB．

The child was knocked _____ by a passing car.A.onB.atC.inD.down