21st Century Unit 1

123456789
Across
  1. 4. to change something completely
  2. 6. a period of ten years
  3. 7. the period just before it becomes completely dark in the evening
  4. 9. to show the meaning or the truth of something more clearly, especially by giving example
Down
  1. 1. happening all the time
  2. 2. mainly
  3. 3. taking photos of
  4. 5. to make something stronger
  5. 8. a subject or problem that people are thinking and talking about