用恰当的关系代词或关系副词填空：1.My brother has become a doctor,___was what he wanted to be.2.In the forest we observed some trees___the leaves were black with disease.
问题描述：
用恰当的关系代词或关系副词填空：1.My brother has become a doctor,___was what he wanted to be.
2.In the forest we observed some trees___the leaves were black with disease.
答
1.My brother has become a doctor,（which） was what he wanted to be.
2.In the forest we observed some trees （where） the leaves were black with disease.