单项选择题

Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．Ozone as a form of oxygen.
B．Problems caused by the thinning of the ozone layer.
C．The origin of ozone problems.
D．The latest studies of ozone problems.
<上一题 目录 下一题>
热门 试题

单项选择题
A gorilla will lose games deliberately to ______.
A．persuade his friends to keep playing with him
B．prove his "theory of mind"
C．attribute mental states to others
D．continue the game with his partners
填空题
policemen
相关试题