After a long walk, the old man be tired now.
I ______ much progress in my English study since last term.
They will call us as soon as they ______ there.
— Were you at home at that time? — No, I ______ dinner with my friends in a restaurant.
— Which do you think is ______ subject, math, music or art? — Art, I guess.
Mike invited me ______ tennis this weekend.