Officials believe that more than one person _____ for the big fire.
Only ticket-holders were ________ to the stadium for the concert given by Jay Chou, so many of his fans were turned away.
The leader is losing ground as the rest of the runners _________.
---I have ______ to apologize for the slight damage to your recorder. --- Never mind.
"Whereyou put the ruler? I can't see it anywhere." "I put it right here. But now it is "
. "What?" "I my key and can't open the door."