Sorry, but Summertime isn't from a musical. It's from Porgy and Bess which is an OPERA!!! Even though it is by George Gershwin I wish people would stop calling it a musical. It isn't. Otherwise, great quiz.
It may be nitpicky, but "The Impossible Dream" is officially titled "The Quest." Never mind, it's a fun quiz and a good inclusion, but if this whole site isn't about pedantry and nitpickiness...
Another quiz where reading the instructions and not the title would have helped immensely. I thought answer was the name of musical as well. I spent a good 90 seconds trying to figure out how the answer for number 2 wasn't Oklahoma or if there was a sequel with that title.
(sometimes being old helps ...)