以下关于insist的用法错误的是?

以下关于insist的用法错误的是?
A、sb. insist on sth.
B、sb. insist that...
C、sb. insist on doing sth.
D、sb. insist doing sth.
【正确答案】：D
【题目解析】：考察单词insist的用法: A选项sb. insist on sth. 意为坚持某种观点; B选项sb. insist that...意为坚持做某件事, that后加从句; C选项sb. insist on doing sth.意为坚持做某件事, D选项sb. insist doing sth.表述错误,中间介词on不能省略. 故选D