"It" creates an object for the liking. If you just say "Do you like here" its unclear and makes the listener think you are referring to how they like "here", wherever that may be. The it clarifies.
2011년 7월 2일
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Yes, only one of them is correct.
2011년 7월 2일
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"Here" is an adv. so it can't be an object.
You can't say "Do you like here?"
2011년 7월 2일
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"Do you like here" is incorrect!
2011년 7월 2일
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Yes. The former is incorrect. You've got to have the 'it'