b) Choose the correct form of "to be": 1. The bag (be) blue. A. am B. are C. is 2. The children (be) young. A. am B. are C. is 3. Thomas (be) nice. A. am B. are C. is 4. The rocks (be) hard. A. am B. are C. is 5. The game (be) difficult. A. am B. are C. is 6. They (be) tired. A. am B. are C. is 7. I (be) thirty years old. A. am B. are C. is 8. Susan and Juan (be) married. A. am B. are C. is 9. Teddy (be) my friend. A. am B. are C. is 10. We (be) in English class. A. am B. are C. is

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