定語從句中這類題怎麼做?怎麼分析 there are altogether five books on the desk

題目：

定語從句中這類題怎麼做?怎麼分析 there are altogether five books on the desk---- two are mine
A on which B in which C of which D from which
選項中前面的介詞怎麼選 怎麼看?

解答：

選C.
原句是這個意思
There are altogether five books on the desk.
Two of them are mine.
them指代上文five books,用which替代,變成
There are altogether five books on the desk,
two of which are mine.