高中英语课本第二册第二单元第六课中有这么一个句子:Just under a third of the population now smokes,about 17 million people.而在第七课的课后练习中(Ex2)中却有这么一个句子:At present about 38%of the Chinese population smoke and millions of smokers die from smoking each year.我认为前者从语法角度来说是欠妥的,而后者则是完全正确的。