SAT OwlAstronomers have identified more than 5,000 planets orbiting stars other than the Sun. Many of these exoplanets lie in their stars' habitable zones, where temperatures could allow liquid water to exist on a planet's surface. ______ no exoplanet has yet shown definitive signs of life, and detecting such signs remains extremely difficult with current telescopes.
Which choice completes the text with the most logical transition?
Accordingly,
Still,
Specifically,
Moreover,
Show answer and explanation
Answer: B
The first two sentences build up the possibility of life elsewhere: thousands of planets, many in habitable zones. The final sentence admits that no signs of life have been confirmed despite this. "Still" signals a contrast with what came before. "Accordingly" and "Moreover" would wrongly present the lack of evidence as following from or adding to the hopeful points.
"Moreover" adds a supporting point, but the final sentence limits the hopeful picture instead of adding to it.
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