Final exams are forcing many students to bum the midnight oil． —That’s true，butlate has a bad effect on their health．

How much money did you pay for the drink?—None. It’s ______.

My scarf made of silk feels _______ and _______. Ms. Cao also wants to buy one like mine.

If we __________ careful，fire can be dangerous。

Though he lost the race, hehimself to be a good driver to the audience（观众）.