The students are clever. They have no problems _____ out the math problem.

A _____ lazy man can’tearn _____ money.

(2013·潍坊市高三二模)As we all know, ________ medical examination will help us find our health problems as early as possible.

don’t have the power to hurt you, _______ theperson who said them means a lot to you.

__, the boy couldn’t enter his house.