—How much do you know about the 3D film
题型：选择题
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．I saw; I began to learn
C．I saw; did I begin to learn
D．did I see; I began to learn