英语题（关于被动语态的）要详细说明和翻译，谢谢

1.he____ as a national hero for winning the first gold medel for his country in the Olympics.

a. regarded b.was regarded c.has regarded d.had been regarded

2.i like these english songs and they_____ many times on the radio.

a.taught b. have taught c.are taught d. have been taught

1. B be regarded as ... 被当作.......

2. D many times 常与现在完成时连用。“歌”是被教的，用被动语态。