His biographers discovered to their surprise that he was an atheist to the backbone.

To lose face

His best jokes <u><em>fell flat</em></u>.

To keep the ball rolling

Rajeev achieved success by resorting to a <u><em>hole and corner</em></u> method.

Sumit had to look <u><em>high and low</em></u> before he could find his scooter key.

Manoj always <u><em>keeps himself to himself</em></u>.

This matter has been <u><em>hanging fire</em></u> for the last many months and must therefore be…

To hit the nail on the head