Because of global warming, the ice that polar bears depend on for survival _______.
Nuclear energy __________ be really dangerous at times even though it's a nice energy in general.
_________ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
"Once people think you are a liar, it's hard __________, no matter what you'll say, " father warned his son.
Obviously, __________ no one wants to be alone all the time, everyone needs some degree of privacy.
—They are quiet, aren't they? —Yes. They are accustomed __________ at meals.