根据句意，用括号内所给单词的适当形式填空。
【小题1】You can’t get what you want if you don’t take _________(risk).
【小题2】At the top of the mountain, Lucy saw lots of large ________(rock).
【小题3】This dog is not Mary’s. Who is its ________（own）?
【小题4】I don’t know why Peter decided _________ (change) his plan.
【小题5】How many _________ (letter) do you get from your friend every month?
【小题6】All _________(area) of the country will have some rain tonight.
【小题7】The girl could _______(give) out food at the food bank.
【小题8】Lily hate _______ (do) the chores.
【小题9】I was _______ (help) my mother in the kitchen.
【小题10】They _______（be）reading in the library when the rainstorm came.