What’s your phone number? —________ 7284587.

Grades are really important, but they’re not ______ to us students.

Where’s David?—He ______ be in the playground because he is fond of playing basketball.

So far, most of the work _______ by others, it’s your turn to do the rest of it.

Do you know _______ the girl in red is?—I’m not sure. Maybe a doctor.