题目内容:
Questions 20 to 22 are based on the passage you have just heard.
A.To learn how people think about ocean. B.To show how ocean affects people's lives.
C.To tell if something goes wrong with the oceans.
D.To develop measures to deal with oceans' problems.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: