Which sentence requires no revision?

new jersey is the state where i grew up in.
christian knows where the party is at.
which bench will you be sitting on?
where are your parents driving to?

I think the first one. 

The point in composing is dependable to write in entire sentences which are accurately punctuated. Sentences dependably start with a capital letter and end with either a full stop, shout or question mark. A total sentence dependably contains a verb, communicates an entire thought and bodes well remaining solitary.

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