A. (1) advertisement (2) customers (3) profit  (4) fortune (5) requires (6) demand (7) supply

B. 1. We’ve decided to **invest** our money for the trip next week.
2. Let’s stay in tonight and **save**.
3. Don’t **waste** all your pocket money on sweets and chocolate.
4. The company has **obtained** permission to start selling in China.
5. You usually have to pay tax when you **purchase** things from other countries.
6. Colin is so rich that he **owns** four Rolls-Royces!
7. Joan **purchased** a few pairs of jeans and went to try them on.
8. It says here that they give you a free glass with every pint of milk you **import**.