1)this engineer/work – these engineers` works 2)my sister/clothes –my  sisters` clothes3)this  woman/secret – these women`s secrets 4)that country economy – those countries' economies 5)this  student/progress – these student`s progresses 6)that man/wife – those men`s wives 7)this sheep/wool – these sheep`s wool 8)my child/toothbrush – my children`s teethbrush 9)this sportsman/coach – these sportsmen`s coaches 10)that farmer/goose – those farmers` geese

1)this engineer/work – these engineers' works 
2)my sister/clothes – my  sisters' clothes 
3)this  woman/secret – these women's secrets 
4)that country economy – those countries economy
5)this  student/progress – these students' progress
6)that man/wife – those men`s wives
7)this sheep/wool – these sheep`s wool
8)my child/toothbrush – my children`s teethbrushes
9)this sportsman/coach – these sportsmen`s coaches
10)that farmer/goose – those farmers` geese