Найдите в каждом ряду глагол во медли группы Perfect Tense и

Найдите в каждом ряду глагол во медли группы Perfect Tense и укажите. 1. a) are determining; b) determined; c) has been determined. 2. a) have furnished; b) is being furnished; c) furnish. 3. a) turn; b) were turning; c) has turned. 4. a) meeting; b) will have met; c) are being met. 5. a) had refused; b) refused; c) refuse. 6. a) obtain; b) have been obtained; c) is being obtained. 7. a) had been offered; b) offered; c) shall offer. 8. a) will be added; b) are added; c) has added. 9. a) was discovered; b) has been discovered; c) discovers. 10. a) are following; b) will follow; c) had been followed.