He is a engineer.改错和My aunt sometimes goes to work byfoot
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Heisaengineer.改错和MyauntsometimesgoestoworkbyfootHeisaengineer.改错和MyauntsometimesgoestoworkbyfootHeis
He is a engineer.改错和My aunt sometimes goes to work byfoot
He is a engineer.改错和My aunt sometimes goes to work byfoot
He is a engineer.改错和My aunt sometimes goes to work byfoot
a-> an 元音前用AN
by-> on 固定用法‘步行’