【题目】We should ________ our teeth twice a day. It's a good habit for us.

【题目】When the beautiful lady ______, everybody stood up, watching her enter the hall.

【题目】Smile is a very basic sense but humans have lost much of the ability to use it ________(恰当地).

【题目】—Would you like to have ________ to eat? —No, thanks.

【题目】China Eastern Airlines has an excellent ______ (安全) record. That is why many people prefer it.

【题目】It took him half an hour ________ to work by bus last Friday.

【题目】Every year, _________ animals are killed in this way.

【题目】Linda, _________ up late, or you will feel sleepy the next day.

【题目】Have all the _______ (乘客) got on the plane yet?

【题目】Experts agree that washing hands regularly is a way to prevent the ________ of many diseases. (spread)