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In this paper, we consider the problems of the convergence that Chomsky's phase notion and the copy theory contain in the derivation of wh-questions. In order to solve the problems, we suggest that we need two different notions of phases in the derivation under Atkinson's (2000) argument: lexical selection phase and derivational phase. Under the two different notions of phase, depending on which type of C is selected from the lexicon, the timing of applying Spell-out can be different in wh-questions. Furthermore, we suggest that unlike English, neither C nor wh-phase has an uninterpretable feature in Korean. They are all interpretable features. Thus, there is no Agree operation between them. Instead, there is a Binding relation between Cs and the wh-phrases. Even though their linking systems are different in Narrow Syntax between Korean and English, there is no difference in LF.