I left out the following sentences. Thank you very much for your help.
1) That night there was a fire and his house was completely destroyed.
2) When he visited the ruins the day after, he saw a gigantic cat with a rope round its neck against the wall that had been behind his bed before.
3) The image seemed engraved upon it and obsessed him for months.
4) One night, in a pub, he saw a black cat, very similar to Pluto, except for an area of white hair on its breast, and took it home with him. The animal became his wife’s favourite pet, whereas the narrator immediately started disliking it.
5) The more the cat was fond of its master, the more he hated it . His hatred grew when, one morning, he found that one of its eyes had been cut out. 6) His hatred, mixed with fear, grew even further when he discovered the image of a gallows on the cat’s white area.
1) That night there was a fire, and his house was completely destroyed.
2) OK except for verb tense
3) The image seemed engraved upon it<~~What is "it"? and obsessed him for months.
4) One night, in a pub, he saw a black cat, very similar to Pluto, except for a patch of white fur on its breast, and took it home with him. The animal became his wife’s favourite pet, whereas the narrator immediately started disliking it.
5) The more the cat showed fondness for its master, the more the man hated it. His hatred grew when, one morning, he found that one of its eyes had been cut out.
6) OK except for verb tense
If all this is telling about a story you have read, all the verbs need to be in the PRESENT tense.
"Write about literature in the present tense unless logic demands that you do otherwise. (Even though a story is written in the past tense, we say that the main character writes to her brother because she thinks she knows something important. Even though Robert Frost is long gone, we say that Frost suggests or uses or says. And in his poems, we say that a phrase or word suggests or means or implies something (all present tense verbs). However, Frost moved his family to England and he died in 1963, etc.)"
http://grammar.ccc.commnet.edu/grammar/composition/literature.htm