ay find the key to the math problem onpage 107.—Ah, it’s so simple. I wonder why I _____ ofthat.

You didn’t have breakfast. You ________ behungry now.

I was doing my homework _______ my mother was doingsome sewing.

History is the best teacher It ______recordsthe development path of each country and foretells the future to us

How is Dennis getting along with his work? — Well, he could always _______ a new idea for increasing sales.