In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs,...
---Are you good _____children?---Yes , I think I can help them ______ English.
He can swim very well, ______ he doesn’t want to join the club.
Are you good at playing _______ guitar or _______ basketball?
-----How do you _____ it?-----W-A-T-C-H,watch.
______those your ______?