Present Perfect или Past Simple.
She _______ (want) to be astronaut when she was a child. She _______ (grew
up) in Texas and _______ (study) biology and engineering at the university. After the
university she _______ (be) a pilot in the Navy. She _______ (join) NASA in 1999
and _______ (become) an astronaut. Since then she _______ (orbit) the Earth 230
times and _______ (go) on three spacewalks in the last mission. She also participates
in science experiments as part of her job, and she _______ (study) the effects of
radiation on plants for the past four months. The most exciting thing she _______
(see) as a pilot is the Northern Lights. She _______ (see) them on a mission last year.​
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