Ответ:1.?

2.they have signed our agreement between companies

3.they sent me a check for $50

4.they gave him a long-term credit two years ago...or....two years ago they gave him a long-term credit

5.her company to the customers gives a discount

6.the study of the promotion laws helps to understand marketing rules of goods in a market

7.generally the interest of amount depend on the rate

8.?

Объяснение: