Give a quiz from a db file
+----------+
| Question |
+----------+
| Answer |
+----------+
| Result |
+----------+
- learn how to use excel library, http://pythonstudy.xyz/python/article/405-파이썬-엑셀-사용하기
- learn mvc design pattern, https://sukhbinder.wordpress.com/2014/12/25/an-example-of-model-view-controller-design-pattern-with-tkinter-python/?blogsub=confirming#blog_subscription-3