Loki is a liar. He _______ be lying! (certainty)
Must / has to
Thor _____ throw his hammer a very long distance. (ability)
Can / is able to
When he was young, Odin _____ see the runes before, but now he can. (ability)
Couldn't / wasn't able to
Pikachu _____ make electricity attacks. (Ability)
Can / is able to
That is silly! He _______ be serious! (certainty)
Can't
The Minotaur is dangerous. Teseous ____ be careful.
Should / Ought to / Must / Has to be
Alladin _____ Jaffar. He is the worse! (Suggestion)
Shouldn't / Ought to not
A long time ago, Frey ______ fold a boat into his pocket. (Ability)
Could / was able to
Heimdall ____ protect the Bifrost bridge. Is his job. (Obligation)
Must / has to
_____ you close the door, please? It's too noisy outside. (Favour)
Can / Could
______ you tell me the time, please? (Formal Favour)
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. (Ability)
Will be able
Because is a law, you ____ smoke here. (Obligation)
Mustn't / can't
