When he was ______ , he had his own film-making company.
A.a child
B.about thirty years old
C.going to America
D.very old

A.A.a
B.about
C.going
D.very

【参考答案】

B
解析：从第四段可知此题应选B。文中说他在三十岁之前，已成立自己的电影公司，编写和制作影片。