Ответ:
Task 1.
1. There are five denominations of notes.
2. What country has a low-cost producer of meat?
3. There are a few changes in price for clothes and footwear.
4. Sometimes it's cheaper to buy than to produce.
5. No individual firm has the ability to control the market.
Task 2.
1. This scientist works at some problems of marketing.
2. Every office worker uses a computer.
3. The licensee gains a successful product and the know-how.
4. The exchange rates change from day today.
5. The price of oil goes up.