They usually spend two hours _______ their homework every day.A. do B doing C to do
We often see Betty ____ the old man with his housework.
You’d better stop ________ .You look too tired.
My teacher encouraged me _______ more books.
-- __________ does your brother look?-- He looks __________ .
— Could you teach me how _________ cakes? — Sorry, I don’t know.