Choose the answer that makes the clearest sense in good accurate English.'There ... ... be traces of water on Mars, but that doesn't mean anyone ever lived there.'

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A modal is a verb that combines with another verb to indicate mood or tense. The main English modal verbs are can, could, may, might, shall, should, will, would, and must.


Choose the answer that makes the clearest sense in good accurate English.<br />'There ... ... be traces of water on Mars, but that doesn't mean anyone ever lived there.'