31.There is no simple answer,_____ is often the case in science.A.as B.that C.when D.where
问题描述：
31.There is no simple answer,_____ is often the case in science.A.as B.that C.when D.where
答
此处as引导定语从句指代整个主句内容,含有“正如”之意,定语从句部分译为“在科学上这是常有的事”.
as is often the case常被看做一个固定短语,还有as was expected等.同时,as常是放在句首的