单项选择题

El Nino is a warm ocean current ______.

A．which centers on America and Africa
B．which was named by an American
C．which kills many people every time
D．which has side-effects all over the world

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热门试题

单项选择题

Which of the following groups is the author most likely addressing to

A．Disaster-relief agencies.
B．Consumers of news media.
C．News media managers.
D．Students of journalism.

单项选择题

The word staple ( Line 1 , Para. 1 ) probably means ______ .

A．big problem
B．tough job
C．important part
D．special item