But they ________be away – I saw them this morning! don't have to can't mustn't shouldn't
Question
But they ________ be away – I saw them this morning!
- don't have to
- can't
- mustn't
- shouldn't
Solution
In this sentence, we need to determine the appropriate modal verb that fits the context of someone being away after having seen them that morning. Let's analyze the choices:
-
don’t have to - Indicates that it is not necessary for them to be away, which contradicts the context of having seen them.
-
can’t - Suggests impossibility; if you saw them this morning, they cannot be away now.
-
mustn’t - Implies prohibition, which does not fit here.
-
shouldn’t - Indicates advice or expectation that something is not right, but does not clearly convey the sense of disbelief regarding their absence.
The best choice is can’t, as it conveys that it is impossible for them to be away if you just saw them.
Final Answer
But they can’t be away – I saw them this morning!
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