—I have learning math and I'm so worried. Could you help me?—Sure. I'd be glad to.
Lily prefers ________after dinner to _______sports to be healthy.
She prefers noodles ________beef and tomatoes.
I don’t like doing the cleaning, because it is ________.
The boy spent 10 dollars ________ the model plane.
America is a ________ country. A.develop B.development C.developing D,developed