题目

Her sister has become a lawyer, _______ she wanted to be. A. who　B. that C. what D. which 答案：D 解析: 分析句子可知，所选关系词引导非限制性定语从句，而且在句中作表语，可考虑A、D两项，而A项可能代指her sister，因而造成歧义；所以用which指代律师这种职业。

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