關于第一個問題我想把句子拆分一下：I don’t know which book he lent.這是一句主謂賓結構，然后that I like 是which book的定語從句。現在把that I like插入句中，位置應在哪里？是I don't know which book that I like he lent.還是I don't know which book he lent that I like.

再有以下一道題（出自于本網站）

------What have you got ____will help a cold?

A.what   B.that   C.how   D.who 

此道題網站給出的解析：選B，that will help a cold為修飾what的定語從句。比較：Have you got anything that will help a cold?以及I've got nothing that will help a cold.

我的問題是 —如果這句疑問句以賓語從句的形式出現，我就隨便添加一個主謂語，比如就I don't know吧，此句就變成I don't know what you have got.現在如果再要把修飾What的定語從名That will help a cold加進去，那應該放在句中哪個位置?應該是I don't know what you have got that will help a cold. 還是I don't know what that will help a cold you have got.