Ответ:
Ex.1
2. Can
3. Was
4. Am
5. Be
6. Couldn't
7. Can
8. Wasn't
9. Am
10. Be
Упражнение 2
1. I couldn't write a story when I was 8. Now I can do it.
2. I wasn't able to draw a picture of robot at the age of 8. But now I am able to draw it.
3. I could use a computer when I was 8 and I can do it now.
4. I wasn't able to speak two languages at the age of 8 and I am not able to speak them now either.
5. I could not spell words in English when I was 8 but now I can.