Parents around the world often urge children over and over-wash your hands!It can be difficult,however,to get children to remember to wash.But what if washing hands was connected to a fun creative activity？What if instead of simply reaching for the soap,a machine could drop it right into your hand？
Well,such a machine was recently built by a boy and his sister in the US state of Maryland as part of a creative competition.The not-for-profit Rube Goldberg Organisation is holding the competition.
Every year,the Rube Goldberg competition assigns a specific task,considering inventions that use complex systems to carry out a simple everyday task.At first,the task for 2020 was supposed to be "turn on a light".But when the COVID-19 happened,the task was changed to "drop a bar of soap into someone's hand".
Those taking part in the competition are schoolchildren.But with schools closed to slow the spread of the virus,organisers changed the rules.This year,the team can include any family members and people were asked to send in recordings of the machines to compete.One thing has not changed：the machine must complete the task in less than10 steps.
In Maryland,the Diel family wanted to enter.So,Caitlin and her brother Ben designed and built their own Rube Goldberg machine.Next,they had to demonstrate that it could complete the task-throwing the soap just right to be caught in someone's hand.After 106 failed attempts,they finally had success.With their video demonstration,they can now enter the competition.
Dr Anne Glowinski teaches child psychiatry（精神病学）at Washington University School of medicine in St.Louis.She said that "creativity and play" connects with children.It is better than the message. "We have to wash our hands because of this horrible virus," Glowinski added.



What might be a task of inventions assigned by the Rube Goldberg competition？ ______

A. Exploring nature.
B. Sweeping the floor.
C. Writing a novel.
D. Painting the house.

What change has been made to the rules of the competition this year？ ______

A. All kinds of inventions are admitted.
B. A video of the entry is qualified to enter.
C. Teachers are encouraged to get involved.
D. The task must be finished within 10 steps.

What does Glowinski think of the invention？ ______

A. Practical.
B. Unnecessary.
C. Economical.
D. Complicated.

What's the purpose of the text？ ______

A. To advocate the habit of washing hands.
B. To call on schoolchildren to compete in a contest.
C. To encourage more inventions from everyday items.
D. To introduce a contest making handwashing fun for kids.