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A n r s e i l l e

36. True

A hobby is often done in one's free time

`=>` hobby `->` ( regular activity ) done during one's leisure time `->` ( free time ). 

37. True

People can gain skills and knowledge through taking up a hobby

`=>` one can acquire substantial skill and knowledge in that area.

38. False

A hobby is mostly developed from the age of two to three

`=>` develops from childhood, more specifically during primary school.

39. True

It's dificult to predict one's new hobby development

`=>` We can ( dificult ) `->` never predict when we ( new hobby development ) `->` develop interests in new things

40. False

Involving in a hobby negatively affects one's health

`=>` Indulging in a hobby is actually good for a sound health. ( negatively affects `->` bad )