问题
How much do you know about the 3D film technology?—A little. Not until ______ the hot movie Avatar ______ some about it. [ ]
A: did I see; did I begin to learn
B:egan to learn
C: I saw; did I begin to learn
D: did I see; I began to learn
B:egan to learn
C: I saw; did I begin to learn
D: did I see; I began to learn
正确答案是：
