We would not __________ such hard work. It's impossible for us to complete it in such a short time.
Emmett hasn’t got enough ______ to remove that stone. He is only 10.
It seems that Jenny is a(n)______lady, for she always works more than 12hours a day.
--Did you listen to Mr. Jackson’s lecture? --Yes, I have never heard a _______one.
Jim apologized for ______ to inform me of the change of the plan.
Great changes ______ in my school in the past ten years.