My sister has a friend ____ mother is a doctor.

My sister has a friend ____ mother is a doctor.
I don't know the reason ______ Mr Zhang hasn't arrived.
Do you know the girl with ______ our English teacher is talking.
This is the house _____ I lived last year.
..只要填引导词就行...
用who ,whom ,that ,which ,where ,whose ,why ,when 填空

第一题是why
第二题是whom
第三题是where
楼主有问题可以继续问哦.
再问： 不好意思、那个,,我问了四道题耶... 标题上还有一题的。。 My sister has a friend ____ mother is a doctor. I don't know the reason ______ Mr Zhang hasn't arrived. Do you know the girl with ______ our English teacher is talking. This is the house _____ I lived last year. 就这四题的,,可以帮帮我吗...
再答： 哦，sorry。标题上的那个是whose。