To wrangle over an ass's shadow

He <u><em>bids fair</em></u> to be an excellent cricketer.

Being an introvert, He will only eat his <u><em>heart out</em></u>.

We should <u><em>give a wide berth</em></u> to bad characters.

To put one's hand to plough

The present syllabus leaves very <u><em>little elbowroom</em></u> for teachers to be innovative.

To beg the question

Whenever I meet him he <u><em>pulls a long face</em></u>.

It is <u><em>high time</em></u> that India did something about the population problem.