Answer:
English translation
the Japanese man is young
I choose one ice cream
the Italian girl is slim
you finished the chocolate
the little girl is smart, she is Belgian
Catherine's brother is tall
The answer is: n<span>ées.
"Mes soeurs jumelles sont <u>n</u></span><u>ées </u> le <span>16 décembre 2006."
It is nees because we're talking about a female subject that is also plural.</span>