单选题
You seem to take a keener interest in the subject（ ）ever been shown before.
Athan has
Bthan have
Cthat has
Dwhich had
正确答案
答案解析
该题考查句子结构.根据题干中的keener可知答案为A、B选项，同时由于than后省略了主语interest，故答案为A。该句中than引导的无主语从句相当于关系代词as引导的定语从句，因此该句可改为：You seem to take a keener interest in the subject,as has ever been shown before.