when the newspaper boy got to a blue door, _________, which frightened him away as fast as possible.
Could you give me a hand __________from the car, please?
--I'm told that John had another car accident this morning.--I believe not. He _________so careless.
The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
--I didn't know this was a one-way street, officer.
--Which play shall we go and see? ----____________________.