Ex.2
1) artist 2) interesting 3) suggestion 4) economic 5) singer
Ex.3
1) b 2) c 3) c 4) b 5) c
Ex.4
1) The new library will be opened tomorrow by the Mayor.
2) The costumes for the play were created by Versarce.
3) Four hundred people are employed by the company.
4) The food is being prepared by the chef.