5. 序数词 first

<img data-key="0" src="http://imagev2.xmcdn.com/group76/M03/B9/73/wKgO3l5jmsrhS7P8AAhCmrQE6NI122.png!op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/group76/M03/B9/73/wKgO3l5jmsrhS7P8AAhCmrQE6NI122.png?op_type=0" data-large="http://imagev2.xmcdn.com/group76/M03/B9/73/wKgO3l5jmsrhS7P8AAhCmrQE6NI122.png!op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" data-large-width="750" data-large-height="2426" data-preview="http://imagev2.xmcdn.com/group76/M03/B9/73/wKgO3l5jmsrhS7P8AAhCmrQE6NI122.png!op_type=4&device_type=ios&upload_type=attachment&name=mobile_small" data-preview-width="140" data-preview-height="452" /> 跟Sunny老师学英语，做最棒的自己！

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跟Sunny老师学英语，做最棒的自己！

跟Sunny老师学英语，做最棒的自己！

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5. 序数词 first

5. 序数词 first