mettle 気概

metal と mettle は homophone（同音異義語）です。mettle は気概、真髄、真価、本領、、、などを意味します。3:36 this year is a "test of our mettle". 今年はイギリス人の真価が問われる一年だ。

The PM's New Year's Message
https://www.youtube.com/watch?v=ld6AwpvYJ_Y  1:03 the King called for Jordanians to "Stand together and show the mettle of the Jordanian people in unity, determination and resolve.'ヨルダン人の気概
Jordan retaliates after ISIS kills pilot
https://www.youtube.com/watch?v=9C0Mfo9JQCo  3:23 McConaughey proved his mettle. マシュー・マコノヒーはこの映画で自分の本領を発揮した。
Top 10 Matthew McConaughey Performances (REDUX)

参考リンク
https://www.youtube.com/watch?v=hI9GyhX7yHM  7:57 when the dust settles, the only thing living in this world will be metal. 全てが終わった時、この地球に残されるのはロボットだ。
Ultron: Best Lines & Moments

練習問題解答
a-5715 prove our mettle
b-0521 test his mettle
b-1190 proved its mettle
b-1723 showing his mettle
b-5311 your mettle's really tested