One fuel supply, two kinds of propulsion
Ground tests came before launch.
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Sources checked 26 October 2026.
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In this lesson: Identify the shared supply and separate ground tests from launch.
Grammar in this story: An action earlier than a report
had completed ground tests
Past perfect places the tests before the September report that described them.
Your turn
Name the completed stages and the result not established by launch alone.
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Ground tests were completed, and a later update reported launch on October 1. Launch alone did not establish completion of the planned propulsion demonstration.
Your answer can be different. Give a reason and use your own words.
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