0Hello.02br 02br 00Either "must" or "may" would be fine.02br 02br 00A: How does Sara know so much about Angkor Wat?02br 00B: She must have lived in Cambodia, or she must have studied a lot about Angkor Wat.0-
0She may have been there = It is possible that she was there / that she has been there.02br 00She must have been there = The only possible conclusion is that she was there / that she has been there.02br 00If you say that she may have been there, you're offering a possible explanation.02br 00If you say that she must have been there, you're drawing a conclusion;