A smartphone can make your life easy and fun.But it can be a 1 , too.When you drop your phone and break the screen( 屏幕 ), it’s 2 to fix( 修理 )it. Wang Chao, a 3 is working hard to fix this problem.He is from the University of Oxford.He is 4 a new material( 材料 )that can fix itself.Wang says he gets the 5 from popular X-Men character Wolverine.The superhero can 6 himself. The new material is self-healing( 自愈的 ), too.When it 7 , it can go back together again in 24 hours, 8 human skin( 皮肤 ). Wang tells 9 scientists about his idea at a meeting in April.He hopes his new material will be 10 for smartphones to use in three years.