Dogs Training Blog

hey what are the prep. phrases in these sentences?1. The left overs from peoples meals were eaten by the dogs.2. There was no waste at the nomads camps.3. The dogs keen sense of smell also helped hunters4. The dogs followed their noses and knew when game was near.and an example would be ogs were trained by nomadic people over 12000 years ago.the prep. in that sentence is ‘over 12000 years ago’plz help and thank you so much ^^

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