To oil the knocker

To be old as the hills

He has <u><em>designs on</em></u> that young girl.

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

Having sold off his factory, Mr. Roy is now a <u><em>gentleman at large</em></u>.

To throw up the sponge

There has been <u><em>bad blood</em></u> between the two communities even before shouting.

To give a false colouring

We were in hurry. The road being zigzag we had to <u><em>cut off a corner</em></u> to reach in t…