Употребите глагол to be в нужной форме (am, is, are, was, were, ...

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Употребите глагол to be в нужной форме (am, is, are, was, were, will/shall be) . 1. In five years they ____ certified specialists. 2. My friend ____ a network manager in a large company some years ago, now he is a lecturer at a financial college. 3. Last year we ____ very busy preparing for tests and exams. 4. There ___ many helpful office application programs today. 5. Computer ____ one of the most wonderful inventions of mankind.