Please correct these sentences

1. It's impossible to avoid aging.
2. A salmon swims against a stream when it is spawning.
3. A nobleman has sold all his property.
4. Ann wiped clean a table and then she laid <em>(or say "placed")</em> on the table her intricate meals on the table.
5. Tom has heard about a threat of flooding.
6. A lot of disabled peoples have appeared after that disaster.
7. Sometimes infancy and aging are very similar periods.
8. Ann made an incorrect conclusion of a major problem; it has misguided her.
9. The worm has permeated <em>(or say "gone")</em> into the apple.
10. The sugar has dissolved in the cup.