EXERCISES FROM PAGE 169

1. 

a) As it was a public holiday, there was a lot of traffic on the roads.

- It being a public holiday, there was a lot of traffic on the roads.

b) When I opened the letter, I realized it was from Professor Alton.

- On opening the letter, I realized it was from Professor Alton.

c) The palace was destroyed by fire during the war but later reconstructed.
- Though destroyed by fire during the war, the palace was later reconstructed.
d) As Carol walked from the room, tears streamed from her eyes.
- Carol walked from the room, tears streaming from her eyes.
e) I broke the camera as I tried to remove the memory card.
- In trying to remove the memory card, I broke the camera.

f) My hair has become soft and shining since I've used Glosso shampoo.

- Since using Glosso shampoo, my hair has become soft and shining.

g) Jan was taken to hospital after she was knocked down by a car.

- Jan was taken to hospital after being knocked down by a car.

h) After he had been shown to his room, George lay down on the bed and slept.

- Having been shown to his room, George lay down on the bed and slept.

2. 

Restoring the sight of people blinded by macular degeneration, a condition of the eye, could start within five years, according to a British team developing human eye stem cell implants. More than 500.000 people in the UK have blindness caused by macular degeneration, a disease marked by a loss of central vision due to degeneration of the macula, a spot at the back of the eye. Having been given almost €4 million towards the cost of developing a stem cell therapy by an anonymous philanthropist, a team from two British universities are starting to conduct trials. Commenting on the project, a spokesman for the team told us affecting up to one third of the population, this condition is a major cause of blindness, so a new kind of treatment is vital. In previous operations, having transplanted tissue from patient's own eye, we have seen about %25 of patients report improvement. However, creating new eye cells grown in the laboratory from human embryos will be much more effective.