389. There was so much ______ in the recent senatorial campaign that voters tuned out, disgusted with the barrage of malicious accusations.
A. incompetence
B. lethargy
C. obstinacy
D. mudslinging
E. grandstanding

390. Recent advances indicate that cures for some seemingly intractable diseases are now within reach, but scientists are being ______ in their public statements, mindful of past claims that proved ______ .
A. circumspect, erroneous
B. nonchalant, unambitious
C. irascible, apocalyptic
D. adamant, invulnerable
E. equivocal, unimpeachable

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