вот, должно быть правильно.

Nick taught his son everything he knows.

Her patient has a bad memory. She can't remember anything.

I think there is something wrong with my watch.

We've got nothing to eat. We've got only something to drink.

The student didn't understand anything because he heard nothing.

- Does he know anything about computers?

- Yes, he knows everything, because he is the best specialist in computer science at Harvard University.

He felt terrible. He couldn't do anything else.

Everything is all right, she is happy today.

Ответ:

1. something

2. anything

3. something

4. nothing, something

5. anything, nothing

6. anything, everything

7. anything

8. everything