By the time the tornado ended, more than 2,000 people _____.
Don’t worry! Philip is quite used to in such busy streets as this.
The teacher was angry about his being late for class, but he behaved ______ nothing had happened.
Candidates ______ remain in their seats until all the papers have been collected.
—Excuse me, Dad, but I’m going to the club to meet my friends in the football team. —OK. ______
His ears are highly ______ to any unusual sound in the machine, that is how he found the fault.