I read China Daily every day because it can keep me _____ of what happens round the world．

I read China Daily every day because it can keep me _____ of what happens round the world．
A.to inform B.be informed C.informing D.informed
为什么选D?请翻译整句
2,Unfortunately,very few sheep ___ the severe winter last year.
A.due B.reliable C.available D.familiar
为什么选A？请翻译整句