根据句意和汉语提示，在空白处填入适当的单词
（1）—I like this camera! Is it yours?
---Yes,I ____(花费)1,200yuan on it last year.
（2）---How often do you play badminton with your classmates?
---____ (一次)a week.
（3）—I am worrried I’m getting fatter.
---You should eat____(少)food and do more exercise.
（4）Having many____ (帮手)makes a task easier.
（5）Huaguo Mountain has become the ____(象征)of Lianyungang.

表面积为324π的球，其内接正四棱柱的高是14，求这个正四棱柱的表面积．

I went to Beijing by plane．(对画线部分提问)

____  ____you go to Beijing?

下列划线词语使用恰当的一项是 （      ）