In the 1960s, people _______send letters by post, but they_________ write e-mails.
Could/were able to - couldn´t/weren´t able to
In the 1960s, people_________ talk with their friends on Skype, but they_______ talk using and ordinary phone.
Couldn´t/weren´t able to--Could/ were able to
In the 1960s, people _________ use text messaging.
Couldn´t/weren´t able to
Today, people________ write Whatsapps.
Can/ are able to
Today, people_______ put photos and messages on Instagram.
Can/are able to
Today, people____________ make video calls, but they _____ do it without a camera.
Can/are able to--Can´t/ aren´t able to
How good is Mary´s English? ______ she ______ understand English films?
Is she able to
Eric did most of the exercises, but he ___________ answer all the questions.
Wasn´t able to/ couldn´t
Don´t say that to Liz. You MIGHT/MIGHT NOT annoy her.
MIGHT NOT
Adam is very shy. He MAY NOT/ MAY make friends quickly at his new school.
MAY NOT
My parents MAY/ MAY NOT disagree with me. But I hipe they will accept my opinion.
MAY
I´m not sure about my answer to this maths problem. I MIGHT NOT/ MIGHT be wrong.
MIGHT NOT
Brian doesn´t feel well. He MIGHT/MIGHT NOT meet us at the cinema tonight.
MIGHT NOT
Jake ran as fast as he COULD/ IS ABLE TO to be escape from the dogs.
COULD
My head hurts a little, but I ______ go to the doctor.
Can´t/am not able to
John grew up near the beach. He_______ surf when he was 8 years old.
Could/ was able to
