We must ______ that the experiment is controlled as rigidly as possible.
A
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WeweretoldthatSuewouldbeidealforthejob,butshe________badlywhenwetalkedtoher.
Attendanceatfootballmatcheshave_____sincethecomingoftelevision.
Thewealthofacountryshouldbemeasured________thehealthandhappinessofitspeopleaswellasthematerialgoodsitcanproduce.