A.- Complete the following sentences with “could “ or “couldn’t”.

1. When I was young, I ________________ play the guitar: it was too difficult for me!

2. Her grandmother was bilingual: she ______________ speak both English and Spanish.

3. Yesterday, Peter ____________ do that exercise alone. So, he called me for help.

4. In 1950, people ________________ use mobile phones.

5. When his mother was young, she ____________________- skate but she can't do it any longer.

6. We _____________________ open the door: it was locked from the inside!

7. In 1900, people __________________________ watch TV.

8. Mary's grandfather _______________- play chess and he was the best!

9. In 1945, people ___________________ play video games.

10. But they _____________________ play chess!

11. Peter __________________ play tennis last Monday: he had broken his arm!

12. When Ann was a teenager, she _________________ watch a horror film: it was too frightening for her!

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