Physics is the present-day equivalent of ______ used to be called natural philosophy, from which most of present-day science aro

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问题 Physics is the present-day equivalent of ______ used to be called natural philosophy, from which most of present-day science arose.

选项 A、that
B、ail
C、which
D、what

答案D

解析 名词性从句。空格前为介词of,可见从空格处开始为一个宾语从句,同时这个宾语从句缺少主语,故连接词用what。
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