The old man wears a set of false teeth when he eats.

--- Jack, you look tired today. What’s wrong? --- I was ____ busy ____ I didn’t go to bed until midnight yesterday.

—How often do you do sports?      —I do sports______ /twaɪs/ a day.

I ------- my watch, but I didn’t -------- it.

--- Do you think people will have ________ work to do in the future?--- I think so. And I think they will have _______ chances to travel.