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题目内容
（桂林理工大学大学英语3）
(单选题)He couldn’t remember( ).(本题1.0分)
A.what was the formula
B.what were the formula
C.what the formula was
D.what the formula were
A.what was the formula
B.what were the formula
C.what the formula was
D.what the formula were
参考答案