Could / Couldn't and Had to / Didn't have to

When I was young, I __________ play the guitar: it was too difficult for me!

• could

• couldn't

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

• could

• couldn't

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

• could

• couldn't

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

• could

• couldn't

We ___________ open the door: it was locked from the inside!

• could

• couldn't

Mary's grandfather _________ play chess and he was the best!

• could

• couldn't

Peter ___________ play tennis last Monday: he had broken his arm!

• could

• couldn't

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

• could

• couldn't

Last Sunday, we ___________ take any photos in the museum: it was forbidden.

• could

• couldn't

I ___________ go to the party last night because I was sick

• could

• couldn't

• can

• can't