Identify the sentence with a correctly used non-defining relative clause:

答案解析

**Core Concept:** Non-defining clauses add extra information and use commas. **Answer Analysis:** - **B** is correct. The clause 'who lives in Paris' is non-essential (set off by commas) and uses 'who' appropriately. - **A/C/D** are defining clauses (no commas) and grammatically correct but do not match the question's focus on non-defining clauses. **Common Mistakes:** Confusing defining/non-defining clauses or misusing commas.
正确答案:B
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