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If [your] students are familiar with the monarch butterfly
Explanation: Since we can't tell from the context available what the referent of the word 'tal' might be here, it's hard to know if this suggestion is precise enough. If it needs to be more specific, how about something like "If your students know (this) about monarch butterflies..."" or "If the students are aware of these things about monarch butterflies..."
Sam Cogdell United States Local time: 09:39 Works in field Native speaker of: English