hearing the news we felt very surprised这里为什么用hearing而不用hear?

hearing the news,we felt very surprised. Hearing the bad news,we f________ very sad hearing the news we felt very surprised这里为什么用hearing而不用hear? excited的副词?We all shouted ________(excited)when hearing the good news. Hearing the bad news ,he felt (u ) 5.the,Nobel,Prize,excited,the,hearing,Mo,Yan,got,we,felt,news,that,all连词成句 On hearing the good news,we all get very excited.这个句子开头的on是什么意思,充当什么? After hearing the good news,the girl jumped( )( )[惊奇地] hearing the news ,he was w____ with joy he felt sad after hearing the f____ news On hearing the bad news,she couldn't help crying. Mum looks much _____(sad)after hearing the bad news . After hearing the bad news,they all went home( )默默地 She fainted on hearing the news 有无语法错误? Mum didn't say anything after hearing the news=Mum ____ ________ after hearing the news Hearing the exciting news,he cried rather than smiled.为什么用hearing而不用hear? We all got very excited when ___ the good news A.hear B.hears C.hearing D.heard 选什么,为什么 Hearing the news that China's first spaceship was launched ____(success),we jumped with joy.我是一个学生.因还有很多问题不能立即选择答案.