问题: she has become a doctor,___she wanted to be
she has become a doctor,___she wanted to be
Awhat
Bthat
Cwho
Dwhich
解答:
she has become a doctor,__D_she wanted to be
Awhat
Bthat
Cwho
Dwhich
which引导非限制性定于从句，先行词：a doctor，关系代词which在从句中作to be的宾语。非限制定于从句有逗号与主句隔开，不能用that引导，也不可省略关系词。
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