Mary ____do her homework first when she gets home.
The 30th Olympic Games ______ in London this summer.
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.