He couldn’t remember______.

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问题 He couldn’t remember______.

选项 A、what was the formulae
B、what the formulae was
C、what were the formulae
D、what the formulae were

答案D

解析从句主语为the formulae，what在宾语从句中充当的是宾语，此处应使用倒装语序。formulae是formula的复数形式。答案是D。

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