be worth doing 是固定搭配,doing 用主動(dòng)形式表示被動(dòng)含義.
另一個(gè)搭配是 be worthy of being done, 或 be worthy to be done.
以上3個(gè)結(jié)構(gòu)意思相同,都是“值得做”的意思.如：
這本書值得一讀.
The book is worth reading.（書是被人閱讀的,但 reading 用主動(dòng)形式表示被動(dòng)含義.）
The book is worthy of being read. （被動(dòng)形式表示被動(dòng)含義）
The book is worthy to be read.
所以,你問的句子前半部分可以有兩種改法：
What is worth highlighting ...或 What is worthy to be highlighted ...
再說后面部分.insist 一般用 insist on sth. 或 insist on doing sth. 或 “insist that 賓語從句” 這么三種形式,所以我認(rèn)為還要做第二處修改,在 insist 后面加上 on.這樣,全句改為：
What is worthy to be highlighted is that we must insist on our opinion.
或：What is worth highlighting is that we must insist on our opinion.
中文意思：值得強(qiáng)調(diào)的是我們必須堅(jiān)持自己的觀點(diǎn).

希望我的講解是正確的.
祝你進(jìn)步!