--Hi, Tracy, you look tired. --I am tired. I__________ the living-room all day.
That is the man ____ house the police found the lost computer last week.
He found that complex problems, especially those _____ abstract thinking, were best for picking out bright and dull students.
. Don’t promise anything _____ you are one hundred percent sure.
You _____ tell him. He is fully aware of the danger.
_____ his ability of speech, he has made use of each chance.