例句： The lack of rain aggravated the already serious shortage of food.

例句： She dashed off a letter to her mother.

例句： My niece is a little devil.

例句： Prices are laid down by the manufacturer.

例句： If foreign aid dries up, the situation will be desperate.

例句： She took a firm stand on nuclear disarmament.

例句： Dustbins are used for household waste.

例句： They had challenged and beaten the best team in the world.

例句： These socks retail at 1 dollar a pair.

例句： How do you write your name?