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¡¡¡¡21. The manager didn’t ask him to come. _______, he was fired.
¡¡¡¡A. In other words B. In a word C. In many ways D. In any way
¡¡¡¡22. They used scientific _______ to do a lot of researches on that subject.
¡¡¡¡A. way B. method C. means D. manner