Youcan#39;timaginewhatgreattroubletheyhave_____theproblem_____.Youcan’timaginewhatgreattroubletheyhave_____theproblem_____.:a、tosolve/beingtalkedaboutb、solving/discussingc、tosolve/totalkaboutd、solving

问题：Youcan#39;timaginewhatgreattroubletheyhave_____theproblem_____.Youcan’timaginewhatgreattroubletheyhave_____theproblem_____.:a、tosolve/beingtalkedaboutb、solving/discussingc、tosolve/totalkaboutd、solving/being

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陈烨的回答：

网友采纳　　Youcan’timagine是主语,你不能想象,难以想象whatgreattroubletheyhave是一个感叹结构,把它先变为正常句子结构,即：theyhavegreattrouble..,他们.有着很大困难,后面跟(in)doing（in可以省略）所以第一...