Correct the mistakes in the sentences.
1. The latest invention is generated heart valve.
2. After prohibition of cloning,scientists switched their attention to genetic
engineering.
3. All spheres of medicine have been involved in an enormous process of
development and research.
4. These supplements are not medicines.
5. Although many people can afford it,we all understand how huge a discovery was
made some 15 years ago.
6. Not many people have gained from development and research.
7. These supplement are made of some common animals and plants.
8. Scientists have achieved numerous positive results in gene engineering.
9. Within some time,this supplement begins to act to stabilize the work of this or that
human organ.
10. Being painless and quick,these operations will lead to improvement of a man’s
eyesight.

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