–I will do the washing-up. Mark, would you please do the floors?--Why_______? Cindy is sitting there doing nothing.
—Dad,why must I stop ________ computer games?—For your health,my boy.
Thanks for ________ me to cross the road(马路).
It usually takes about ten minutes ________ to school.
—What do you ________ this new club?—It’s nice and big.
The workers will build a new railroad ________ the two cities.