Complete the sentences with one of the forms of the verb to be: am, is, are. 1. These sportsmen_______ very good. 2. The book ____ old, but it ___very interesting. 3. I ____ a student of economic department. 4. That bag ___not mine, it ____hers. 5. Those cars ____ beautiful and powerful. 6. The children _____ not hungry, but they ____ tired