单选题 13.  Both of my parents insist ______ a computer for me, but I don't think it is necessary.
【正确答案】 C
【答案解析】[考点] 非谓语动词
insist on doing sth. 为固定用法,其中动名词作介词宾语。故选C。
   我父母都坚持给我买一台电脑,但我认为没有必要。