题目内容
20．Public health is one of the important questions they have to think about．（ ）
| A． | most | B． | more | C． | / |
分析 公共健康是他们必须仔细考虑的最重要的问题之一．
解答 答案：A 根据one of the…可知，此处表示比较的范围是"所有的重要的问题之一"，要用形容词的最高级；"最…之一"的表达形式：one of the+形容词最高级+名词复数形式．句中important的最高级形式是most important，并且形容词最高级前要加定冠词the，故选A．
点评 判断形容词或副词的比较级和最高级，主要是看几者之间的比较．两者之间用比较级，三者或三者以上比较用最高级形式．本题是三者以上之间的比较．
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