Complete Duncan and Nick's conversation with some/any and much/many.

Duncan: Hey Nick, have you bought [any] souvenirs from your trip to London?
Nick: Yes, I have. I bought [some] keychains and [some] postcards.
Duncan: That's cool! How much money did you spend on them?
Nick: I'm not sure, but I didn't spend [much] money. The keychains were quite cheap.
Duncan: Did you visit [any] famous landmarks in London?
Nick: Yes, I did. I visited [some] museums and [some] historical sites.
Duncan: Wow, you must have learned [a lot] of interesting things!
Nick: Yes, I did. There were [many] exhibits and [many] artifacts to see.
Duncan: It sounds like you had [a great] time in London!
Nick: Yes, I did. There were [many] things to do and [many] places to explore.