— Which do you think is ______ subject, math, music or art?[— Art, I guess.
—Who helped Li Lei with his English? —______, he learnt it by himself.
Not only my classmates but also my teacher ________ watching football games.
Would you like ________ for a walk after supper?
Don’t worry about ________. He can do it well by himself.
—Is this camera mine? —No, it isn’t________. It’s________.