—Is the boy in white clothes your friend, Kangkang? —No. ____ in black clothes is.
—Do you like swimming?—Yes, swimming is a good way _______ fit.
—Would you like to climb mountains with me this Sunday?—I’d love to. But I _______ play table tennis against Class Three.
Sam spends two hours _______ his homework every day.
He is ill. I don’t know _______ he will come to school.
—_______ do you prefer, walking or running?—I like running better.