Topics: Past Modals
The inspector pulled some of the loose bricks out. Behind them, there was a small tunnel just big enough for a person to get through.
“That’s it. The thieves ___ have dug a tunnel to get in. Let’s follow it and see where it leads.”
A. might
B. must
Select your answer:

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Modal Verbs › ViewWhat does ‘mustn’t’ suggest about an action?
A. ‘Mustn’t’ suggests that an action is prohibited.
B. ‘Mustn’t’ suggests that the action is optional.
C. ‘Mustn’t’ implies uncertainty about the action.
D. ‘Mustn’t’ indicates a strong recommendation.
Past Tenses › View
Linda _____ tie her shoes when she was only 3 years old
A. knew to
B. knew how to
C. could to
D. may
