Ⅰ、ABACB
Ⅱ、ACCBC
Ⅲ、knowledge;work;search;friends;waste
IV、ACDCAA
V、1、simple
2、advantage
3、hide
4、caused
5、protecting
VI、1、care 2、depend 3、less 4、received 5、enter
VII、CDEAB
VIII、DACDB BACDC
IX、DBAC
X、mistake;century;widely;almost;eel;afraid;take