课文视频（人教版高中）
B4U2-Learning about vocabularies2
2018-03-26
B4U2-pre-reading of A pioneer for all people
2018-03-26
B4U2-Main ideas of the passage
2018-03-26
B4U2-Learning about vocabularies
2018-03-26
B4U1-sound changes
2018-03-26
B4UI-subject-verb agreement
2018-03-26
B4UI-subject-verb agreement
2018-03-26
B4U1-how to skim a passsage
2018-03-26
B4U1-vocabulary
2018-03-26
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