He __________a maths teacher when he was 22 years old在take part in,be born,ride a bicycle,practice the accordion ,athlete,alive,become,sneeze,piano中选一个

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He __________a maths teacher when he was 22 years old在take part in,be born,ride a bicycle,practice the accordion ,athlete,alive,become,sneeze,piano中选一个
He __________a maths teacher when he was 22 years old
在take part in,be born,ride a bicycle,practice the accordion ,athlete,alive,become,sneeze,piano中选一个

He __________a maths teacher when he was 22 years old在take part in,be born,ride a bicycle,practice the accordion ,athlete,alive,become,sneeze,piano中选一个
became

became 成为

became

became

很高兴为您
because 成为(过去式)
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