用被动语态改写下列句子
1.They have postponed the concert
The concert________________
2.Somebody is using the computer at the moment
The computer____________________
3.I didn't realise that somebody was recording our conversation
I didn't realise that our conversation
____________________________________
4.They are building a now ring road round the city
_________________________________________
5.They have built a new hospital near the airport
_________________________________
1、The concert have been postponed by them.2、The computer is being used at the moment .3、I didn't realise that our conversation was being recorded.4、A now ring road round the city is being built by them.5、A new hospital near the airport have been built by them.
