Let's start from Basic English

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Across
  1. 5. at the present time
  2. 6. a journey taken for business purposes
  3. 8. the system for using computers to send messages over the internet
  4. 9. ordinary or usual
  5. 10. a small plastic card that can be used as a method of payment
Down
  1. 1. to delay an event and plan or decide that it should happen at a later date or time
  2. 2. a picture, short film, song, etc. that tries to persuade people to buy a product or service
  3. 3. the name of a search engine
  4. 4. a person who buys goods or a service
  5. 7. to make an arrangement or meeting certain, often by phone or writing