Since astronaut Yuri Gagarin became the first man to travel ...
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Ano: 2012
Banca:
Aeronáutica
Órgão:
EEAR
Prova:
Aeronáutica - 2012 - EEAR - Sargento da Aeronáutica - Aeronavegantes e Não-Aeronavegantes |
Q667977
Inglês
Since astronaut Yuri Gagarin became the first man to travel in space in 1961, scientists _________ what effects space travel has on the human body.
(Adapted from Active Skills)
Fill in the blank with the correct verb tense.