7. (organize / the halloween party) last sunday by your friend polly? 8. the present / give) ann on her birthday? 9. the / plant) in our garden. 10. a big ) by tom’s mother last sunday.

7Was the Halloween party organized last Sunday by your friend Polly?
8Was Ann given the present on her birthday?(Можно и так, второй вариат)Was the present given to Ann on her birthday?)
9The flowers weren't planted in our garden.
10A big cake was cooked by Tom's mother last Sunday.