根据句意，写出括号内所给单词的适当形式。
The boy is 1.55 metres in ________ (high) .
He keeps writing in English about ________ (day) life to improve his English.
“You’ve grown up now. You’d better learn to take care of _________ (you).” Mum said to us.
The little girl is shy and she is _______________ (active) in class.