whom ......................?
7. somebody cooks meal every day. / meal ...................... by someone every day.
8. he wore a blue shirt. / a blue shirt .................... by him.
9. may god bless you with happiness! / ................... with happiness.
10. they are building a house. / a house ...................... by them.
11. i have finished the job. / the job .......................... by me.
12. i sent the report yesterday. / the report ................... yesterday. 