单选题
（ ）,a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.
AOther things to be equal
BWere other things equal
CTo be equal to other things
DOther things being equal
正确答案
答案解析
该题考查独立主格结构.根据句意及两分词间无连词,空格处应填一状语成分表条件.首先排除选项B（省略if的倒装句,而a man who expresses...is poor是一真实句不符合虚拟语气的构成）,该句同样符合独立主格结构构成标准,故答案为D,另外D选项也可替换成从句if Other things are equal,..