MCQ
To put one on one's mettle
From Idioms and Phrases · English Language Competence Test
To put one on one's mettle
To be at daggers drawn
To change colour
He resigned the post <u><em>of his own accord</em></u>.
To cut the Gordian knot
I did not know that he was <u><em>pulling my leg</em></u> all the time.
To see eye to eye with
In modern democratic society <u><em>lynch law</em></u> seems to have become a common feature in …