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题库 / Prep2007E2-SC-15
In the mid-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.
that would investigate changes in working conditions as to their effects on workers' performance
investigating the effects that changes in working conditions would have on workers' performance
for investigating what the effects on workers' performance are that changes in working conditions would cause
that investigated changes in working conditions' effects on workers' performance
to investigate what the effects changes in working conditions would have on workers' performance
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(e) "what the effects" is ungrammatical.
also, in constructions of this sort, "what" is generally redundant / unnecessary; it's better merely to say "to investigate X" rather than to say "to investigate what X is" (or other such wordy construction).
不定式和从句的区别