To make the grade

The soldiers <u><em>laid down their arms</em></u>.

To blow hot and cold

To snap one's fingers

I <u><em>sent him about his business</em></u> as I could stand his insolence no longer.

He <u><em>passed himself off</em></u> as a noble man.

He has been working <u><em>on and off</em></u> for several years on this research project.

A fool's errand

This report <u><em>calls in question</em></u> all previous research on the subject.