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241. Unlike some entertainers whose performances rarely vary, jazz great Louis Armstrong frequently ______ during his performances, spontaneously ______ new phrasing in existing songs.
A. vocalized, eliminating
B. improvised, introducing
C. deliberated, satirizing
D. ad-libbed, rehearsing
E. extemporized, bungling
242. Not wanting to speak , Julia the urge to announce her scientific findings until she had double-checked the data.
A. harshly, indulged
B. prematurely, suppressed
C. inappropriately, acknowledged
D. rashly, advanced
E. enthusiastically, defined
