单选题 ______ the child expresses his interest in an activity, the stronger it will become.
A) The more frequent B) The frequenter
C) The more frequently D) the frequentlier

【正确答案】 C

【答案解析】用“the+比较级，the+比较级”的结构表示“越来越……”，修饰动词express应用副词frequently，而frequently的比较级是在前面加more。