157. In the mod-1920s the Hawthorne Works of the Western Electric Company was the scene of an intensive series of experiments that would investigate changes in working conditions as to their effects on workers’ performance.
A. that would investigate changes in working conditions as to their effects on workers’ performance
B. investigating the effects that changes in working conditions would have one workers’ performance
C. for investigating what the effects on workers’ performance are that changes in working conditions would cause
D. that investigated changes in working conditions’ effects on workers’ performance
E. to investigate what the effects changes in working conditions would have on workers’ performance
A: their没有指代
B: correct
C: that没有指代
D: conditions’ effects 改变原意
E: changes in working conditions would have做定语修饰the effects，what the effects没有谓语。
E的谓语不是have么？怎么错了？
我主要根据to排除的
what the effects谓语是have
B. investigating the effects 『that changes in working conditions would have 』on workers’ perfor
E. to investigate what the effects changes in working conditions would have on workers’ performance E结构混乱，effects changes 。。。 would have on 错， 若changes是N，则effect应用单数修饰，若为V，则出现2动词
E结构混乱，effects changes 。。。 would have on 错，
若changes是N，则effect应用单数修饰，若为V，则出现2动词
E结构混乱，effects changes 。。。 would have on 错，
若changes是N，则effect应用单数修饰，若为V，则出现2动词
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