4. Write something/somebody or anything/anybody.

Решение:

1. A woman stopped me and said something, but I didn't understand.
2. 'What's wrong?' 'There's something in my eye.'
3. Do you know anybody about politics?
4. I went to the shop, but I didn't buy anything.
5. Somebody has broken the window. I don't know who.
6. There isn't anything in the bag. It's empty.
7. I'm looking for my keys. Has anybody seen them?
8. Would you like something to drink?
9. I didn't eat anything because I wasn't hungry.
10. This is a secret. Please don't tell anybody.

Ответ: something, something, anybody, anything, Somebody, anything, anybody, something, anything, anybody.