英语笔译能力综合2级教科书采用insistindoingsth,是否语法错误原文如下：Andnowhewasbeingfurtherpilloriedbecausehehadinsistedinkeepinghis“wordofhonor”tothedonors,allgoodfriendsandrespectedcitizens.

Question

英语笔译能力综合2级教科书采用insist in doing sth,是否语法错误
原文如下：
And now he was being further pilloried because he had insisted in keeping his “word of honor” to the donors, all good friends and respected citizens. Not to reveal their names.
按理如此严谨的书籍怎么会出现语法错误的例句?

Answer 1

And now he was being further pilloried because he had insisted on keeping his "word of honor" to the donors,all good friends and respected citizens.Not to reveal their names.
是 insisted on.