Those are the things ___________ I lost in the street yesterday.A.which B.that 改选哪一个为什么?He is the doctor ___________we often talk about.这个填 who whom that 是不是都可以啊?

Those are the things _that__________ I lost in the street yesterday
He is the doctor __whom/ that _________we often talk about.
who不可以， talk about后面加宾语，而who指代主语

这些都是东西_____昨天在街上我失去了
句子失去了对象，事情的前因，这是句子那些，我们只能使用它。

他是我们常说的医生__。
先行，作为一个谈对象，谁，谁，是，千万不要填写。

第一题选Which
定语从句,句子意思是"这些就是我昨天在街上遗失的." Which是指明Those are the things 这些东西. 其实如果没有选择的话, WHICH 和THAT 也是没错的.
第2题选who和whom都可以这样讲, 但that很少这样讲的.

which ， that

Those are the things _____ I lost in the street yesterday.
句中lost少宾语,有先行词things,which、that均可,但句首those,所以只能用that.
He is the doctor __ we often talk about.
有先行词,且充当talk about的宾语,who、whom、that、不填均可.

1. A /B 都可以
2.who /whom /that 都可以