1. has been established
<span> 2. have been founded
3. has been estimated
</span>Во всех трех предложениях время Present Perfect Passive.
Настоящее завершенное время в пассивном залоге.
«have / has»+«been»+ V3 (Ved)
Э сингл дабл бед; эн анмэд бед; эн ан комфортабл бед
Were designed
Was opened
Were taken
Are often called
Weren’t introduced
Are used
1. I watch TV for an hour per day.
2. I usually watch TV in the evening.
3. I normally watch TV with my family .
4. I like to watch the travel program the most.
5. Yes, I have a favorite TV program. It’s about travel.