People like to shop in the supermarket because they are interested in the ________ of goods on offer and can buy whatever they want.

Mrs. Obama introduced the Let’s Move _______ yesterday. Its goal is to reduce children obesity(肥胖) today and in the future.

Could you give me a ___ in your car?

“I don't think it's my ________that the TV blew up. I just turned it on，that's all，”said the boy.

Working hard is not only a _____ of great success, but it is among the essential requirement.