Govind has left his country for good.

He is in the habit of responding <u><em>at the drop of a hat</em></u>.

To turn amuck

To play on a fiddle

Though he has a lot of money, yet all his plans are <u><em>built upon sand</em></u>.

I cannot <u><em>conceive of</em></u> a time when I was without a refrigerator

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

To have brush with

The old beggar <u><em>ran amuck</em></u> and began to throw stones at the passerby.