Loki is a liar. He _______ be lying! (certainty)
Must / has to
Thor _____ throw his hammer a very long distance. (ability)
Can / is able to
Pikachu _____ make electricity attacks. (Ability)
Can / is able to
That is silly! He _______ be serious! (certainty)
Can't
_____ you close the door, please? It's too noisy outside. (request)
Can / Could
______ you tell me the time, please? (polite request)
Could
He ____ arrive later, if the traffic is not bad. (Possibility)
May / Might
People ______ travel to Mars in the year 2100.
May / Might / Will be able to
Is impossible! It ____ be true! (Certainty)
Can't
Tomorrow she is having a test, and she _________ pass the exam, I'm sure of it. (Ability)
Will be able
Because it is a law, you ____ smoke here. (Obligation)
Mustn't / can't
Don't worry about the homework. You ______ do it now. (Neccesity)
Don't have to / Needn't / Don't need to
He ___ be the criminal, but I'm not so sure. (Certainty)
Might / May / Could
Homer hasn't eaten yet. He _____ be hungry. (Certainty)
Must
We finished the class. You ____ go. (Permission)
Can / May / Are permitted to
