We must do something to _____ factories _____waste water into the river before it is cleaned.
I told Sally how to get here, but perhaps I ___ for her.
____ telephone is working here. You have to get them____.
While ___ along the street, I met an old friend of mine.
European football is played in 80 countries, ____ it the most popular sport in the world.
He made a promise that he would __________us todinner the next day, but he broke his word.