a) 1. did not, felt
2. cried, smiled
3. shouted
4. worked
5. caught
6. sent
b) 1. The children didn't listen to their mother...
2. Peter didn't go home at once
3. She didn't do her homework...
4. The children didn't run...
5. The postman didn't knock...
6. They didn't look at me...
7. We didn't leave the house...
8. She didn't tell him...
9. The lesson didn't begin...
10. They didn't know anything about me
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