清白1h 31m 12s (91。20 分)
成语1He\'s probably 20 years old.
2Maybe he is 20.
3He may be 20.
4Perhaps he is 20 years old.清白1+根号2分之1+根号2+根号3分之1+...+根号2012+根号2013分之1
Interest Is the Best Teacher
i was not able to get high marks when i was in primary school. teachers didn\'t like me because i was not a good student. mother considered me as a bad kid. they hurt me by thinking i am a retarded child. but i am no fool.
almost all of my paintings were showed in public. many famous artists had praised me for my paintings. they called me \"little prodigy\". and dad was on my side too. he encouraged me to do what i liked and what i thought was proper.
he told me that interest is the best teacher