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• 对话填空Melisa-M Li Lei-LM:Look!This looks so interesting.There are dragons and frogs on it.L:Ah,it's a great invention of an cient Chine.M:Really?When was it invented?L:I think it _____ ______ in Han Dynasty.M:What _______ it ________for?L:Guess!M:_______it_______ for holding water?L:No,it_____ _______for testing earthquakes.M:Really?But how?L:Read this and you will know everything.M:Wow.it's really amazing.
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