The question under discussion here is ______ of the "white pollution".
We are faced with the necessity to recognize that having more people implies a lower standard of living.
Although many people view conflict as bad, conflict is sometimes useful _______ it forces people to test the relative merits of their attitudes and behaviors.
— I phoned you at 7 yesterday evening but nobody answered. — Oh, I ________ my dog in the park then.
Paris________ be a wonderful city but it’s not somewhere I’d like to live.
A decline in electricity output forces industrial estates and cities to burn more coal and give out more carbon to _________ the shortfall.