When he went to a party, he accepted a cigarette which he was offered by a friend可不可以改为When

问题描述:

When he went to a party, he accepted a cigarette which he was offered by a friend可不可以改为When
When he went to a party, he accepted a cigarette which he was offered by a friend.可不可以改为
When he went to a party, he accepted a cigarette which offered by a friend.

你给的原句怪怪的
一般说When he went to a party, he accepted a cigarette (which was )offered by a friend