206.Which of the italicized parts functions as a subject?
We never doubt (that her brother is honest.)
The problem is not (who will go but who will stay.)
You must give it back to (whoever it belongs to.)
答案解析
解析：
考查主语从句。D 中是 it 做形式主语,that 后面是真正的主语,是主语从句。A 项 that 引导宾语从句;B 项 who 引导表语从句;C 项 whoever 引导定语从句,作介词 to 的 宾语。
相关知识点：
句子成分主语考点细分辨
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