将以下句子用引号标出的动词改成被动语态,省略someone.

将以下句子用引号标出的动词改成被动语态,省略someone.
⒈Someone “has prepared” a meal for you.
⒉Someone “will translate” the book into English.
⒊Someone “must send” a telegram to him.
⒋Someone “had put out”the fire before the brigade arrived.
⒌Someone “gave” the cat some milk to drink.
第四句改为：Someone “had put out”the fire before the fire brigade arrived.