He has accomplished a Herculean task.

The lady was shedding <u><em>crocodile tears</em></u>.

To read between the lines

To make clean breast of

The arrival of the mother-in-law in the family proved a <u><em>rift in the lute</em></u>.

The social worker rendered <u><em>yeoman service</em></u> to the victims.

If you <u><em>rub him the wrong way</em></u>, he is bound to react.

At my friend's tea party I <u><em>fell in with</em></u> a strange fellow.

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