Read and match the heading to the short part.

Before mobile phones were developed, you could only call someone with a phone which was connected to a phone line. That problem meant that it was often difficult to contact people, particularly if you were on a bus or in a car.

• IT WAS IMPOSSIBLE IN THE PAST
• SWITCH FINGERS
• PLAY IT SAFE
• FACE THE CONSEQUENCES OF GERMS
• CHANGE THE TECHNOLOGY
• SAVE YOUR SIGHT
• PROGRESS IN MESSAGING
• THEY MIGHT BE DIFFERENT
• LEADING TO BACK PROBLEMS
• MODERN GADGETS' SLAVES