Here are the answers
Elementary Questions
1C, 2D, 3B, 4C, 5B
Intermediate Questions
1B, 2A, 3D, 4D,
5D, 6A, 7C, 8B
Advanced Questions
1A, 2C, 3B, 4C
(Translated by Xu Mengmiao, Fathom Language Limited)
Editor:Jiang Yiwei