The lab _the experients used to be done is being repaired.A.where B.that C when D whichexperients 改为experiments实验

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Thelab_theexperientsusedtobedoneisbeingrepaired.A.whereB.thatCwhenDwhichexperients改为experiments实验The

The lab _the experients used to be done is being repaired.A.where B.that C when D whichexperients 改为experiments实验
The lab _the experients used to be done is being repaired.
A.where B.that C when D which
experients 改为experiments实验

The lab _the experients used to be done is being repaired.A.where B.that C when D whichexperients 改为experiments实验
A 考查定语从句
句子主干部分为the lab is being reqaired
中间 从句部分where the experiments used to be done 用来修饰lab
因为lab在从句中充当地点状语,即 the experiements used to be done (in the lab)
所以用where来引导
B 和D 答案 中的that 和which 充当主语或宾语的.

A. where

选A. where ,因为先行词the lab 放回后面的从句要加上一个介词in,即the experiments used to be done in the lab才成立,where 在这里相当于in which,是地点状语。