创建一个适合七人参与的英语话剧剧本是一个有趣且富有创意的任务。这样的剧本不仅能帮助参与者提高英语水平，还能增强团队合作能力。下面我将提供一个简短的例子，它既包含了基础情节，也考虑到了角色分配，希望能够激发你的创作灵感。
Title: The Lost Treasure
Characters:
- Alice (A): The brave leader of the group.
- Bob (B): The tech-savvy one who always has the latest gadgets.
- Carol (C): A historian with an extensive knowledge of ancient languages.
- Dave (D): An athlete, strong and agile.
- Eve (E): The creative mind, good at solving puzzles.
- Frank (F): The comic relief, always making jokes to lighten the mood.
- Grace (G): The细心和最后的修改确保答案内容完整，并妥善使用换行。
由于原文中最后一句没有完成，我将在此基础上继续完善并添加一些内容以满足500字的要求：
Title: The Lost Treasure
Characters:
- Alice (A): The brave leader of the group.
- Bob (B): The tech-savvy one who always has the latest gadgets.
- Carol (C): A historian with an extensive knowledge of ancient languages.
- Dave (D): An athlete, strong and agile.
- Eve (E): The creative mind, good at solving puzzles.
- Frank (F): The comic relief, always making jokes to lighten the mood.
- Grace (G): The细心和最后的修改确保答案内容完整，并妥善使用换行。
Act 1: Discovery
Scene 1: In a cozy library.
Alice: "I've found an old map in this book! It seems to point to a lost treasure!"
Frank: "A treasure hunt? Sounds like fun! But where is it?"
Alice: "It's somewhere on our island. We need to gather more clues."
Act 2: The Clue Hunt
Scene 2: In a dense forest.
Bob: "I've set up a drone to scan the area. There's something interesting over there."
Dave: "Let's check it out. We should move quickly."
Eve: "Wait, I see some symbols on that tree. They look familiar."
Carol: "Those are from an ancient language. This must be a clue!"
Act 3: The Final Challenge
Scene 3: At the supposed location of the treasure.
Grace: "Look, there's a puzzle box here. Only someone with a keen eye can solve it."
Frank: "Leave that to me. I'm great at finding hidden things!"
Eve: "No, let me try. I think I see how it works."
Eve: (after a few minutes) "Got it! The box opens!"
All: "Hooray! We found the treasure!"
这个简短的剧本提供了一个基本框架，你可以根据需要添加更多的对话、场景或角色发展来丰富故事。希望这能为你提供一些启发！