1. Slim thought it was strange that they are friends because back in the day men were lonely.
2. idk
3. I wasn't surprised when Candy let Carlson shoot his dog because the dog is old and suffering.
4. Candy hopes that Lennie and George let him join their American dream of owning their own farm.
5. Candy is scared that he will get canned from his job because he is injured and old. Which wouldn't be helpful to the farm since Candy will be doing less work.
6. idk
7. Curley attacks Lennie because he thinks he is one of the new people at the farm and is very easy to pick on. Which he just puts the blame on Lenne since Slim is not new.