9.To attend a formal party, how will you dress yourself?

　　参加正式晚会，应如何着装？

　　An evening dress or a suit

　　晚装或套装。

　　10.On formal occasions, how many colors of all your clothes should be?

　　在正式场合，一个人全身服装的颜色应该多少种？

　　No more than three.

　　最好不超过三种。