what you said is in contrast with what comments above. Which one is correct?

Sure. I'll do that.

Thanks for your suggestion, but it is not my homework. It was written by English teacher in a website. He wrote that Number 1 is correct and I though that maybe number 2 will be correct as well. The second sentence is written by myself.

how about?I've got no Thursdays free this term.

Thanks for your reply. You meant because of 'with' we use 'own' in the participle form. like I am interested in reading books.?

@ JavaLatte Great sample. and our choice for using "at which" instead of "on which" or "in which" is because of the verb in the dependent clause or because of the noun 'time'?

@JavaLatte allow me to apologize for infringing on your time. I am really sorry for making you confused. I got it. Thanks so much.

I meant : Can we substitute relative adverb "where" for [preposition +which], whenever we saw the 'where' in our sentences. Like my examples above. I meant by saying "reverse .." is that we can't replace [preposition+which] whenever we see [where] in our sentences. Like my original example.

Can I ask: whenever we see the relative adverbs like "where" , we can replace them with "preposition +which". I know the reverse of this statement can't be true and correct.for example" There is a skating school where yo can take lessons, and there is a cafe where you can enjoy lunch or dinner after skate." Can I replace "where" with "which +preposition"?

"The second "to" isn't necessary but it does make the sentence flow better." If I do that then parallelism doesn't make sense as we have one side "either + noun phrase" and the other side "or +to +noun " which is prepositional phrase which seems to be wrong and it is not a parallel structure on both side of correlative.

Sorry. I don't want to replace a relative pronoun with preposition +which. I want to replace relative adverbs with 'preposition + which'. Sorry If I couldn't tell what I meant. For example: I like to visit NY the city where I was born //// I like to visit NY the city in which I was born. where= in +which