I believe the questions of this sort, coming mostly from you, have already been answered in detail. I suggest you go over your earlier posts. You are stuck with 'a', 'any', and 'the', while you neglect other areas. I see many a problem with your post.
You should read more than you currently do, and soon half your questions would be answered by the exercise.
You can discard my advice, but that won't be advisable.
PS: Last year in October (give or take a week or two) , a post by Navi pertaining to the same problem was answered in much detail. It was about pen(s) rather than house(s). You should check that one out.
PS': If you are able to find that post, and understand that post, then I am sure you would learn two great lessons: one in grammar, another in logic.