答え合わせお願いします。2文を1文に。

The man is sitting over there. He wrote that best-selling novel.
The man who he wrote whom best-selling novel is sitteing over there.

The book is for the students. Their native language is not English
The book is whose native language is not English for the students

She showed me the letter. She received it from her boyfriend.
She showed me the letter which she received from her boyfriend.

The bed wasn't very comfortable. I slept in it last night
The bed in which I slept last night wasn't very comfortable.
The bed which I slept in last night wasn't very comfortable.

No.1 ベストアンサー 回答者： Him-hymn 回答日時： 2013/11/09 19:26

The man who he wrote whom best-selling novel is sitteing over there.

→The man who wrote that best-selling novel is sitting over there.が正解です。

The book is whose native language is not English for the students
→The book is for the students whose native language is not English. が正解です。

She showed me the letter which she received from her boyfriend.
正解です。whichはthatも可能です。

The bed in which I slept last night wasn't very comfortable.
The bed which I slept in last night wasn't very comfortable.
どちらも正解です。2番目のwhichはthatも可能です。

以上、ご参考になればと思います。