来自童凯的问题
____ontheprojectfor10years,hestillfeltithardtomakeanyachievementsa.heworksb.havingworkedc.hehavingworkedd.working正确的选什么?并一个个解释一下为什么其他3个不行,都错在了那里?
____ontheprojectfor10years,hestillfeltithardtomakeanyachievements
a.heworks
b.havingworked
c.hehavingworked
d.working
正确的选什么?并一个个解释一下为什么其他3个不行,都错在了那里?
