答案：A

考查定语从句和强调句型。It is与第一空that构成强调句型，强调地点状语in Hong Kong. 定语从句That you have been wanting to buy修饰先行词the cellphone，that指代the cellphone在句中做buy的宾语。句意：你就是想去香港寻找你一直想买的手机。