教科书
参考答案：又称课本。是依据教学大纲（或课程标准）编制的、系统反映学科内容的教学用书。它是课程标准的具体化
—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
会计师事务所申请证券相关业务许可证时，应提交最近5年的年度会计报表。（ ）
