I would visit the 1950s because there is so much history and a lot happened back then and I would be there and be a reporter to learn everything and to know more
When somebody puts " ing " at the end of a word (verbs) its become " happening " for example: watch- watching * present noun.
And to it's in future like I'm going to sleep it's when you are going to do it
Him.
If you don't know how to solve this, you can put each word in to the blank and see which sounds right.