Have you ever seen a solar panel(太阳能电池板)in your neighborhood?Solar panels take energy from（1）sun and turn（2）into electricity.In the past ten years,the price of solar panels（3）down greatly.In many parts of the world,solar energy is now（4）form of electricity.More and more people have started using solar energy（5）their homes. However,solar panels also have their problems.They stop（6）at night and（7）rainy days.Is it possible（8）them produce electricity all the time? Scientists at Suzhou University,China,（9）a new solar panel now.It can produce electricity not only from solar energy（10）from falling rain.When a raindrop falls on the solar panel and then（11）down,it creates friction(摩擦力)on the surface of the panel,（12）can then be turned into electricity Sun Baoquan is one of the（13）.“Our new invention can produce electricity in any weather during the day,”he says.It can even provide electricity at night if there（14）rain. The solar panel,（15）,does not make much electricity from falling rain.So Sun Baoquan is still working hard（16）it.The scientist（17）wants to make solar panels more flexible,which are as（18）as clothing. The field of solar energy is developing fast.Scientists around the world have been improving solar panels. Some have been（19）on ways to join solar panels and wind power together.Some have been trying（20）sunlight to produce liquid and gas fuels(液体和气体燃料).