—Do you know sound travels very fast? 一Yes. But light travels _________ sound.
—Let’s make tomato and beef noodles. — .
Their life will be__________ if there are ____________children in a family.
—I don’t know your e-mail address. Could you please here? —Sure.
Frank ______ to see his grandpa if he ______ free tomorrow.
— ______ salt do we need? — One spoon is enough.