【题目】You had better ask your brother _______ playing computer games. It’s bad for him.

【题目】It is a chance for people to share their interesting e__________ in Africa. People like to talk about them.

【题目】—You look sad.What has happened?

【题目】—Scientists tell us smoking can cause cancer.

【题目】Could you tell me how to ________ at the table?

【题目】He likes designing buildings, so he wants to be one of the best a__________ in this city.

【题目】You are weak. _______ important for you _______ every day.

【题目】---I’m sorry. I’ve made some mistakes in the exam.

【题目】He found it a very t__________ journey and he really needed a good rest.

【题目】—Humans can’t live _______ air.