mr.smiths did much work to help others改为同义句紧急.....改为Mr.Smiths did ( )( )( )work to help others.没说清楚不好意思

mr.smiths did much work to help others改为同义句
紧急.....
改为Mr.Smiths did ( )( )( )work to help others.
没说清楚不好意思

Mr.Smiths did a lot ofwork to help others.
Mr.Smiths did a number of work to help others.