Điền mấy từ sau vào đoạn văn sau:
[ bartering, deal , goods, negotiating, swapping, transaction ]
1____________ was used before money was invented and dates back to Mesopotamia in 6000 BC. It involves 2____________ either a service or 3_____________ for something else in return. In order to get a good 4____________, you need to be skilled in 5______________ to ensure you aren’t receiving something worth much less than the item you’re exchanging.
( Giúp mik vs ạ, mik cảm ơn )