Manoj always keeps himself to himself.

Harassed by repeated acts of injustice. he decided to <u><em>put his foot down</em></u>.

To wash one's dirty linen in public

His father advised him to be <u><em>fair and square</em></u> in his dealings lest he should fall…

The members of the group were <u><em>at odds</em></u> over the selection procedure.

Hobson's choice

To get cold feet

He <u><em>left</em></u> his friend <u><em>in lurch</em></u>.

To be lost in the cloud