改为同义句 People are doing different things now

1.People are doing different things now.
= People are doing different things at the moment.
2.The young people are at work.
= The young people are working (now).
3.Mr green goes to work by car.
= Mr Green drives (a car) to work.
= Mr Green goes to work in a/his car.
4.They are shopping(对shopping提问）
= What are they doing?
5.They are having dinner.
同义句= They are eating dinner/supper.
划线提问：What are they doing?(对having dinner提问)
Who is having dinner?(对They提问)