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 他不记得公式是什么了。在此句中,what在宾语从句中充当的是宾语,该从句主语为theformulae,此处应使用倒装语序。formulae是formula的复数形式。
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