________ really enjoyable, ____________ us a valuable lesson.
A.Not only the film was; but also it gave
B.Not only was the film; but also it gave
C.Not only the film was; but did it also give
D.Not only was the film; but did it also give
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B解析这题考查倒装句的用法，not only在句首时，句子用部分倒装，but also在句首时，句子不用倒装。选B。