单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．How to keep fit.
B．Common diseases caused by vitamins.
C．Vitamins and our health.
D．Vitamin in different kinds of vegetables.

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Despite its successes, the UN still has to face ______.

填空题

In a world governed by mutual fear and mistrust, the most dangerous problem for the UN to deal with is ______.

Passage One Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。