This math problem is too difficult. Can you show me________, George?
.—_____? —I usually play tennis.
Mike was late for class, so the teacher made him at the back of the classroom.
Who is _____ swimming, you or she?
.He tries ____ English and he practices _____ English every day.
.—What ________ the twins _________ on weekends? —She usually goes skateboarding.