man's best friend

man's best friendとは犬のことです。12;37 under his failed leadership, man's best friend has been forced into Government controlled automobiles. 指導力を欠いたオバマのもとで、犬は政府専用車に収容されてしまった。

http://www.youtube.com/watch?v=Fd4xD6GU0MQ 23:37 it is staggering that man's best friend can reap so much damage amongst people.
http://www.youtube.com/watch?v=_bfr0KljFdU 0:04 there's a reason why they call him man's best friend.
http://www.youtube.com/watch?v=Pm9IsxTQSTA 0:06 they say a dog is man's best friend.
http://www.youtube.com/watch?v=C00f27lPrT0 0:09 what do we really know about man's best friend?
http://www.youtube.com/watch?v=327m3wukAow 0:02 usually it's a dog that's a man's best friend.

参考リンク
http://bridge-english.blogspot.jp/2010/06/blog-post_7764.html 忠犬ハチ公を英語でなんと言うか？

練習問題解答
a-3009 man's best friend
b-3465 his best friend