Read these sentences and fill in the gaps with 'could', 'can', 'couldn't', 'can't'. 1. Sally talk to customers yesterday as she was a bit nervous. 2. No matter how hard I try, I see the difference in the two pictures Susan says she can easily see. 3. I run very fast when I was fifteen years old.

Задание

Read these sentences and fill in the gaps with 'could', 'can', 'couldn't', 'can't'.

Sally couldn’t talk to customers yesterday as she was a bit nervous.
No matter how hard I try, I can’t see the difference in the two pictures Susan says she can easily see.
I could run very fast when I was fifteen years old.