I have no idea ___ David is in trouble, he will turn to you for help.
--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? ----_______________.
You _________think you're clever, but that doesn't give you the right to order me about!