Ответ:

1)

science

astronaut

theories

doctor

did

take

2)

couldnt

had

could

was

couldnt

didnt

3)

work-worked

play-played

study-studied

stop-stoped

listen-listened

live-lived

use-used

carry-carried

drop-droped

enjoy-enjoyed

4)

1) lived

2) had

3) didnt use

4) were

5) could , couldnt

6) dressed

7) didnt had

8) invented

Думаю все правильно :)

Объяснение: