Chọn đáp án đúng: He is not .... ride a motorbike ( enough old to/ enough old for/ old enough to/old enough for )

1 he is not .... ride a motorbike (enough old to/ enoughnold for/ old enough to/old enough for )
2 i don't talk much in public . i am rather ( kind / sociable /reserved /humorous)
3 the children go to school ....( myself / himself/herself/ themselves)