A．Certainly, I will.B．Never mind.C．I don't know.D．I'm all right. A: Certainly, I will. B: Never mind. C: I don't know. D: I'm all right.

I know one thing: that I know __________.

（） about the actor. A: Little I know B: Little know I C: Little do I know

Not until I came to China ______ what kind of country it is. A: I knew B: I didn't know C: I did know D: did I know

One thing I know,that is I know nothing.

Little _____ how much difficulty he had gone through. A: I knew B: I know C: did I know D: does I know

I knew nothing of the motives behind his recent move, and I don't know either the person to put him up to the action（）. A: nor did I know ... who B: not did I know ... that C: nor do I know ... that D: either did I know ... who

Only after I read the text over again ______ its main idea. A: that I knew B: did I know C: I could know D: I did know

25. So little _____ about mathematics that the lecture was completely beyond me. A: I know B: I knew C: do I know D: did I know

I would ask her to a movie, but I _________ her name. A: don't know B: know C: hadn't know D: will know