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Classic usage
Vocabulary level: Intermediate · Flesch–Kincaid grade 6 · 3,243 sentences
Vocabulary level is estimated from word frequency, not an official CEFR classification.
Subjects: Impostors and imposture — Fiction · Love stories · Science fiction · Space stations — Fiction
Words worth knowing: tragically · collide · clearance · pitfall · unbelievable · misjudge · incognito · surveillance
SPACE STATION 1 by FRANK BELKNAP LONG ACE BOOKS A Division of A.
A. Wyn, Inc. 23 West 47th Street, New York 36, N. Y.
SPACE STATION 1 Copyright 1957, by A.
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Classic usage
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