题目内容：
I was giving a talk to a large group of people，the same talk I ___to half a dozen other groups before. 选择一项：
A.
was giving
B.
had given
C.
am giving
参考答案：
选择题：I was giving a talk to a large group of people，the
- 题目分类：哈尔滨电大直属学院-人文英语
- 题目类型：选择题
- 查看权限：VIP
选择一项：
A.
was giving
B.
had given
C.
am giving