You must return the book in fifteen days.
你必須在十五天內歸還書籍。
I have fourteen roosters and fifteen hens.
我有十四隻公雞和十五隻母雞。
There are fifteen boys and nineteen girls.
男生有十五位，女生有十九位。
He did this sixteen times.
他這樣做了十六次。
I have sixteen turkeys.
我有十六隻火雞。
I'm sixteen, after all.
畢竟我十六歲了。
Jenny is seventeen years old.
珍妮17歲。
He had confessed to seventeen murders.
他已供認了17項謀殺罪。
Nora thought he was seventeen years old.
諾拉覺得他有17歲。