Don’t forget to go to the football match tomorrow.—I ________.

A smile costs_______, but gives much.

e you asked Peter for advice––No, he ______ someone, so I didn’t disturb him.

To “stick to something” means that you continue to do it and don’t ______.

ee, I’m poor in physics and you arenot good at chemistry, and……— That’s _______ we should help each other.