高考英语：According to a US report,human being are __for global w

高考英语：According to a US report,human being are __for global warming.
1.According to a US report,human being are __for global warming.
A.to be blamed B.to be blaming C.to blame D.blaming
2.Do you know __Amazon River in South America is __second longest river in the world?
A./;the B./;a C.the;the D.the;a