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 seedid I begin to learn
B:I saw Ibegan to learn
C:I saw did Ibegin to learn
D:did I see Ibegan to learn
B:I saw Ibegan to learn
C:I saw did Ibegin to learn
D:did I see Ibegan to learn
正确答案是：
