-advertisement-
-advertisement-
Which piece is missing?
Great, you answered "A".
See here what other people have answered:
- A
- B
- C
- D
Click "CONTINUE" to proceed to the next question
Interesting fact:
Neuroscientist Daniel J Levitin says that the era we live in is negatively affecting our brain, sending emails. Checking Facebook or Twitter and combining these activities with other day-to-day tasks make us less effective people.