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can’t; see can’t; be seen weren’t; see weren’t; seen
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aren’t allowed; wasn’t seen aren’t allowed; didn’t see don’t allow; wasn’t seen don’t allow; didn’t see
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A. can’t see can’t have seen mustn’t have seen needn’t have seen
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haven’t seen didn’t see wasn’t seeing don’t see
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Animals don't have the intelligence that man has. Animals can hardly express what they want. Animals can only use sign language for their communication. Animals can not speak the same way as man does.
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