(单选题)
He insisted on doing ______ good to others.
A.what he thought it was
B.what he thought was
C.what he thought
D.what it was he thought
参考答案：B
参考解析：
考查what引导的宾语从句。句意：他坚持做他认为对别人有好处的事。______ good to others.充当doing的宾语从句，且宾语从句中嵌套一个插入语he thought，即what (he thought) was good to others。故选B。
知识点：
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