阅读下面短文，根据题目要求用英文回答问题。

There’s something magical about the way imagination works. Around the world, kids are using imagination in ways that were once only found in science fiction.

Take the story of Mark Lee. He loved biking around his neighbourhood but grew upset seeing that many plastic bottles littered the parks and sidewalks. Instead of simply complaining, he decided to do something about it.

Using an old 3D printer, Mark started experimenting. He melted（熔化）plastic bottles down and tried shaping them into small bricks. At first, everything went wrong — the plastic broke, the printer jammed, and the pieces didn’t fit together. Friends laughed a little, and even Mark’s parents thought he should just give up.

But Mark had a different idea. He redesigned the bricks to lock together like puzzle（拼图）pieces and adjusted the heating temperature carefully. After months of trial and error, he succeeded. With a little help from his school and the local community centre, Mark used his bricks to build a small bike shelter for his neighbourhood.

And he’s not alone. Thirteen-year-old Sally Carter loved reading fantasy books. Inspired by magical maps in her stories, she wondered: what if we could build a real-world app that helps people explore hidden places in their own cities? She gathered friends, learned some basic programming, and together they created an app that maps small local parks and gardens few people knew about. Their app quickly grew popular in town and even won a local youth innovation award.

Next time you see a young person lost in thought, don’t rush to pull them back. They might just be imagining the next great idea.

（1）What upset Mark when he was biking around his neighbourhood?

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（2）How does the app created by Sally and her friends help?

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（3）Please decide which part is false in the following statement, then underline it and explain why.

> With encouragement from his friends and parents, Mark built a small bike shelter for his neighbourhood after months of trial and error.

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（4）How can you put your imagination into practice as Mark and Sally did?（In about 40 words）

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