Câu 7. Rewrite each sentence,beginning as shown so that the meaning stays the same.
1.Nobody has used the old house in the village for a long time
The old house........
2.they have sent modern submarines to investigate the seabed
Modern submarines........ 
3.A lot of people suffer from techno stress.Those people work in my office
A lot of people...... 
4.John is absent from school .his mother's in hospital 
John,who........
5.Arlene Black never turned up.Guy invited her onto his chat show
Arlene Black ,whom......
6.We have bought a new car for our family
A new car .....