“Nobread eaten by man is so sweet as______earned by his own labour. ”

The English teacher herstudents how to improve their comprehension skill since last week.

Can you come up ________ a good idea

Mr. Black ________his keys in the office，so he had to wait until his wife ________ home.

Four dollars a pair? I think it’s a bit toomuch.-If you buy three pairs, the price for each will ____to three fifty.[ ]