–Don’t forget to turn to me if you have any trouble.

-- ______________.

If you don’t go swimming this afternoon, she won’t go. _____.

—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

Never before in my life ________such a beautiful girl with so many high qualities. 

A. I met    B. did I meet   C. I have met    D. have I met

. —You can't finish the book in less than an hour, I suppose?

—_______. I’ll return it to you on time.