The old man hardly ever speaks English, but he knows ______ English words

Jenny, you can’t go out to play _____ you finish your homework.

If you ________ your attention on the jobin hand, you’ll soon finish it.

Do you have enough to________all your daily expenses?—Oh yes，enough and to spare.

Children must have access to good books.—I can’t agree more. Reading is to the mind ________ food is to the body.