【正】 本刊读者向蒋英老师提出如下几个问题问一:以下两道题的句子结构我不太明白,请您讲解一下。1.His pronunciation____he has paid muchattention is improving.A.for which B.with whichC.on which D.to which2.Such difficult experiments____you didthat day need much patience____imagination.A.like;as well as B.as;as well asC.for;as well D.like;as well