complete the sentences with could or couldn039;t2. People ... communicate faster

Complete the sentences with could or couldn't

2. People ... communicate faster when emails were invented.
3. My brother ... speak English when he was born, but now he can.
4. My grandfather ... see better when he bought some new glasses.
5. I ... go to Scotland because i didnt have any money.
6. Mozart was a child prodigy. He ... play the piano when he was four years old.