500
When was the last time you ________ (go) to the cinema? _____ you _____ (eat) popcorn during the film? There was a time when cinemas _______ (did not) sell popcorn. Charles Cretors _______ (invent) the first popcorn maker in 1885. It ________ (make) a lot of popcorn quickly and cheaply, and popcorn soon ________ (become) popular at parks, zoos, circuses and sporting events.
went, did, eat, didn't, invented, made, became