---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.
They’re late. The film _____ for 5 minutes.
. I didn’t sell it. I _______it ________.
—Do you ______ my smoking here?—Of course not.
The little boy is very brave. He ______ through the jungle with us last week.
We find _____ important to use a foreign language well.