HIs teacher is trying to reduce his fear ___ he would fail in the final exam.A.as B that

问题描述:

HIs teacher is trying to reduce his fear ___ he would fail in the final exam.A.as B that
解释是同位语从句,请问A错在哪里?

答案是that.
是同位语从句.his fear == he would fail in the final exam.同位语从句用来his fear的具体内容.
用as是不对的,因为as在这里作为连接词指代不明,是原因,还是结果,还是时间