Look at this photo!  It is a photo of Sam' s family and Jack' s family. They are at Jack' s home. They have a party there. Sam and Jack are good friends. Jack and his family will go on a round-the-world journey . They will start  from their home in America, and they will go to Japan, China,  India,  Australia,  Egypt, England, etc. Jack and his family have the party to say goodbye to their friends. Jack' s son Nick is only 8. Sam's son, William, is Nick's good friend. He can't see Nick for a long time. He gives Nick a nice pen. He says it can help Nick remember  good things on their journey . What do Jack and his family have the party for?
To say goodbye to their friends. To ask their friends for help. To thank their friends. To make new friends.