Câu1:didn't use to play/play.
Câu2:didn't use to smoke.
Câu3:used to be/is.
Câu 4:used to like/eats.
Câu5:didn't use to cook/cooks.
Câu6:didn't use to have/sends.
Câu7:used to have/watch.
Câu8:used to watch/watch.
Câu9:used to drink/drink.
Câu10:loves/used to hate.