All the members thought that the plan should be changed but he still his own idea.A. ins

问题补充：

All the members thought that the plan should be changed, but he still his own idea.

A. insist on

B. insist

C. stick to

D. kept

答案：

A. insist on

B. insist

(答案→)C. stick to

D. kept

解析：句意：所有的成员认为这个计划将会被改变，但是他依然保持他的想法。分析：insist on 后面加doing，而且insist on 是坚决主张；坚决要求；强调的意思。stick to 后面一般加名词，而且stick to 有忠于（理想等）；坚持、继续的意思。故选C