Articles

1) This is a house. This is the house in which I live.
2) This is butter. This is the butter I bought for you.
3) My father is a worker. His father is the worker who made improvements on this machine.
4) This man is the teacher whom I had told you about. Ann's mother is a teacher.
5) His wife is a doctor. His wife is the doctor who treated my sister.
6) February is the shortest month. July is the seventh month of the year. [not wrong but understood]
7) It is an Indian movie film. It is the film movie we discussed yesterday. Here in Hollywood, we make a distinction between "film" and "movie".  "Film" is the physical thing in which a movie can be screened from.
8) The cow is a domestic animal. The carrot is a vegetable. The carp is a fish.

Correct me, please.