【单选题】.Not only____the book,but also he remembered what he had read.
【单选题】Hardly (he had) entered (the office) when he realized (that he had) (forgotten) his wallet.
【单选题】(Hardly he had) entered (the office) when he realized (that he) (had forgotten) his wallet.
【简答题】叠加定理是对电流和电压的叠加,对(__)不能进行叠加。
【单选题】Not only ______ the book, but he remembered what he had read.