If you want to buy this dress， you’d better ____ first to make sure it fits you.

She has many nice dresses. She wears a different oneevery day ______ the week.

You are_____ to hand your paper in before the class is over.

Earth is believed ______ by an object the size of Mars at some point in the distant past before itssurface cooled.

I think chocolate is good for your health.—________.