Ehglish high-hand,come help help me

Ehglish high-hand,come help help me
有几道想不通的英语题目,答案我知道,
1.-What di you know about the plan
-I know every detail about it.＿ I think I know.
A.There for B.Or rather C.Namely D.That is
The key is B ,why
2.Li Yu,the king of the southern Tang Dydasty was ＿ a ruler of a country.
A.more a poet than B.more than
C.a port more than D.better than
The key is A ,how to explain it?
3.It is ＿ work of art that everyone wants to have a look at it .
A.so an unusual B.such an unusual
C.so unusual D.such unusual
1.Namely 有“即”的意思，为什么不选它？
2.more than的意思是“不仅仅”，选它没错啊。