bar code , deliver  - to take goods, letters, parcels, etc. to people's houses or places of work, alarm clock goes off  - If a warning device goes off, it starts to ring loudly or make a loud noise, housework  - the work of keeping a house clean and tidy, a thing of the past  - something that no longer happens, mention  - to speak about something quickly, giving little detail or using few words,

Unit 6 Listening Vocabulary

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