You looked so tired this morning. How much_____ for the work? —Oh, I was just helping my friend.

Is this ________ key, Tom? —No, that one is ________.

Why are you lying in bed? —— A __________ walk __________ me completely tired．

Are the keys yours?－No, they aren’t _____. I think they’re Jason’s.

____hard ,and you will make greater progress.