Mostly， inventions happen because someone works to solve a problem． Kids are natural inventors．They often create amazing thing from simple ideas．Here are a few examples that might make you wonder，"Why didn't think of that？"

   Popsicles

   Popsicles were invented by 11﹣year ﹣old Frank Epperson in 1905． He forgot a drink of juice and left it with a stir（搅拌） stick in it outside on a cold night． The next day it was ice． Because of this he couldn't drink it any more， but he could eat it． It tasted good! These ice sticks became popular among kids at school in summer because they were delicious and helped them stay cool．

   More than a hundred years later， popsicles are sill one of the best summer treats!

   Crayon Holdans

   When 11﹣ year﹣ old Cssidss Coldstein needed crayons for a school project，she had a hard time because，there were so many small or broken ones．She found some small clear plastic tubes（管子）at home．Although the tiny tube were usually filled with water to keep flowers fresh， she found that they fit tightly （紧紧地） around the crayons． She was now able to hold them easily．This is how she invented Caryon Holders．

   Wristies

   When snow gets in kids' gloves and their hands get wet， they feel uncomfortable.10﹣year﹣old Kathryn Gregoary decided to do something about it．She created the wristies as she wanted to keep her wrists（手腕）warm and dry． Wristies are long gloves with no fingers and they are worn under your coat． They help you when you work in the cold because your hands stay warm while you use your fingers． With her parents' help， Kathryn also opened a small shop where she sold her wristie． And she still runsit today．

   All these inventions have one thing in common﹣the kids were trying to solve problems in their lives． When you meet problems， what would you do？ If the kids can do it ，you can do it， too!

（1）Popsicles became popular among kids at school in summer because 　　．

A．	they could not only drink them but also eat them
B．	they tasted good and helped them stay cool
C．	the stir sticks were useful in popsicles
D．	it was easy to make them

（2）The underlined word "runs" in the passage means" 　　"in Chinese．

A．	经营
B．	跑步
C．	行驶
D．	竞赛

（3）Where do you think the passage is from？ 　　

A．	A novel．
B．	A guidebook．
C．	A science magazine．
D．	A poster．

（4）What 's the main idea of this passage？ 　　

A．	Let us run a shop like Kathryn．
B．	Everyone can become an inventor by accident．
C．	Kids are so clever that they can invent things．
D．	When you meet problems， never give up and you can solve them well．