If nothing______, the oceans will turn into fish deserts.
Nearly a month had gone by they showed some sign of giving up the price for which they had held out.
In the years , the city government will take effective measures to bring the price of the house under control.
. According to some doctors, one of the ways to prevent us from growing old is to make sure that our brains get enough___.
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.