用括号中所给单词的适当形式填空。
（1）Peter is a kind and____ (help) boy, and we all like him.
（2）Excuse me, can I give me two____  (knife).
（3）Daniel's birthday is on the____  (nine) of March.
（4）Thanks for ____  (invite) me to the party.
（5）Look, there are so many ____  (policeman) over there.
（6）It's ____  (luck) to live in a community like that.
（7）Do you want to do some ____ (shop) with me this afternoon?
（8）He will ask someone ____ (fix) your bicycle. It doesn't work.
（9）My flat is on the ____ (twelve) floor in that tall building.
（10）This is my ____ (three) day in Russia.