In Antarctica, the Syowa East observatory site monitors activity in the upper atmosphere of the southern __________ in Finland, another observatory site, Hankasalmi, monitors the sky of the northern hemisphere. Together, they are part of the Super Dual Auroral Radar Network-or SuperDARN, as space physicists like Mark Lester call it.
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Verbal·Standard English Conventions·Boundaries
hardWhich choice completes the text so that it conforms to the conventions of Standard English?
A
hemisphere,
B
hemisphere;
C
hemisphere and
D
hemisphere