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Verbal·Craft and Structure·Words in Context
medium
Before the Mariner 2 mission completed a successful flyby of Venus in 1962, astronomers’ ideas about the planet were little more than __________. Venus’s atmosphere is so thick that Earth-based observations had yielded very little information about the planet.
Which choice completes the text with the most logical and precise word or phrase?
A
summations
B
conjectures
C
exemplifications
D
conclusions