一 How much do you know about the 3D film technology?

一 A little. Not until _____ the hot movie Avatar _____ some about it. [ ]

A. did I see; did I begin to learn

B. I saw; I began to learn

C. I saw; did I begin to learn

D. did I see; I began to learn

中央提出落实“税收法定”原则要求后，全国人大常委会审议通过的第一部单行税法是（）

A.资源税法

B.环境保护税法

C.资源开发税法

D.资源利用税法