Thank you for your help. I'm sorry that I didn't make my questions clear. Now, I'm trying again. Please help me one more time. Thanks a lot.
For Question A, I read the sentence in the following dialogue, and I don't really know what the word "it" refers to in the sentence.
Linda: Wow. There are a lot of spooky toys.
Peter: Sure. We have a ghost mask, a red nose, long nails....
Sam: Who has vampire teeth?
Peter: I do. Here you are.
Sam: Thanks. But these are black. I need white teeth.
Peter: Why? Black teeth are cool.
Sam: Itís dark in the spooky house. You canít see them there.
Linda: Well, any good ideas?
Peter: What about a vampire
Peter: Our vampireís very, very old. Haha.
For Question B, I wonder if "any" can be followed by a singular countable noun in negative sentences or questions.