In country after country, talk of nonsmoker’s right is in the air. While a majority of countries have taken little (51) no action yet, some 30 nations have introduced legislated steps to control smoking. Many laws have been introduced in other countries to (52) clear the air for nonsmokers, or to cut cigarette consumption.
Smoking is harmful (53) the health of people. World governments should conduct serious campaigns against it. (54) on cigarette advertisements, plus health warnings on packages and ban on public smoking in certain places, (55) as theaters, cinemas and restaurants, are the most popular tools used by nations in (56) of nonsmokers or in controlling smoking. But world attention is also focusing on another step (57) will make the smoker increasingly self-conscious and uncomfortable about his habit. Great efforts should be made to (58) young people especially of the dreadful consequences of taking up the habit. And cigarette price should be raised.
In the long run, (59) is no doubt that everybody would be much better-off if smoking were banned altogether but many people are not (60) for such drastic action.
57().
A.so
B.as
C.which
D.such
参考答案：C
解析：
空格前为一完整的主谓结构，空格后是一缺少主语的主谓结构。由此判断，空格处应填入一连词，而且该连词在从句中充当主语。四个选项中，as和which都是连词。根据上下文的内容判断，该连接词引导一定语从句，先行词是step。as作关系代词用时，它的先行词一般是整个句子。因此可以排除，得出C为正确答案。
