根据句意及所给中文提示或首字母提示，写出句中所缺单词。
We know a lot about that great ____________ (宫殿).
We all know that Beijing is the c____________ of China.
I’m going to be an ____________ (艺术家) in the future.
My home is about fifteen ____________ (英里) form my school.
John’s grandfather is old, but he still wants to learn some ____________ (技能).