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she had started high school when she learned to ride a bike
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she left home when she finished high school
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She was living in Medellin when she got her first job
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She was working when she started studying Microbiology
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She had been studying Microbiology for 1 year when she started to learn English
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-She had been making part of the research group for 2 years when she started her degree.
-She has been working and learning English while she has been making her degree work