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．It is not worth writing about.B．It is quite appropriate.C．It should be narrowed down.D．It should be expanded.
A．It is not worth writing about.
B．It is quite appropriate.
C．It should be narrowed down.
D．It should be expanded.
单项选择题
A．Amy Johnson’s life story as a female flyer.B．Amy Johnson’s great contribution to aviation.C．Amy Johnson’s determination to be a pilot.D．Amy Johnson’s flight to Australia.
A．Amy Johnson’s life story as a female flyer.
B．Amy Johnson’s great contribution to aviation.
C．Amy Johnson’s determination to be a pilot.
D．Amy Johnson’s flight to Australia.
相关试题