Remember how Harry Potter and his friends used magic spell to make their feathers float in the air？Now you can do magic too!Here are three fun experiments you can do at home to see the power of static electricity （靜電）!

Dancing Plastic Bag What you will need： a plastic stick，a piece of cloth，a light plastic bag Steps： Rub （摩擦） the stick with the cloth for 40 seconds； Flatten the plastic bag and rub the cloth against it for 40 seconds； Wave the stick and you will see the bag "dance" in the air.
Jumping Pepper （胡椒） What you will need： a plastic spoon，salt，pepper，a piece of cloth Steps： Mix some salt with some pepper； Rub the spoon with the cloth for 40 seconds； Hold the spoon over the mixture.And you will see the pepper jump up to the spoon，while the salt stays still peacefully.
Bending （彎曲） Water What you will need： a plastic stick，a piece of cloth，running water Steps： Rub the stick with the cloth for 40 seconds； Turn the tap on so there is a steady stream of running water； Hold the stick close to the water and watch it "bend".

（1）The writer mentioned Harry Potter and his friends

C

C

.
A．to show the readers why the movie was popular
B．to tell the readers how wonderful static electricity is
C．to make the readers know how to do fun experiments
D．to lead the readers to find out the magic world
（2）If you try the second experiment，you should

D

D

.
A．put the pepper close to the cloth
B．choose the right size of the cloth
C．rub the spoon for more than 30 minutes
D．put the mixture of salt and pepper under the spoon
（3）We can learn from the passage that

B

B

.
A．it is better to use a heavy bag in the first experiment
B．rubbing produces electricity
C．a(chǎn)ll the three experiments should be done in a science lab
D．bending water is the most difficult experiment of the three