One important factor of success is to set a goal and have the ______ to achieve it.

Nowadays，few people form the habit of keeping a supply of candles in the house in case of power ________.

As a member of one world, each of us has a role _____ to make the earth a better place.

James has put on so much weight recently that his mother has to ______ all his trousers to his measure.

(2013·湖北武汉武昌区高三联考)One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.