单项选择题
I was giving a talk to a large group of people, the same talk I（）to half a dozen other groups before.
A.was giving B.am giving C.had given D.have given
单项选择题 Two thousand dollars（）enough for the car.
单项选择题 --Could I borrow your CD of English songs? --（）
单项选择题 --What would you like, tea or coffee? --（）
