00:39:54

Unit 3 Science and nature The perfect copy A newspaper article and two reader letters_第一课时_吴老师_吴老师_第一课时

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00:44:55

Unit 3 Science and nature The perfect copy A newspaper article_第一课时_刘老师_二等奖

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00:38:08

Unit 3 Science and nature The perfect copy A newspaper article and two reader letters_第一课时_谢老师_二等奖

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00:31:37

Unit 3 Science and nature A debate about cloning._第一课时_周老师_三等奖

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00:17:22

Unit 3 Science and nature The perfect copy A newspaper article and two reader letters_第一课时_李老师_三等奖

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00:42:00

Unit 3 Science and nature The perfect copy A newspaper article and two reader letters_第一课时_黄老师_三等奖

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00:41:58

Unit 3 Science and nature The Perfect Copy: Reading and Writing_第二课时_梁老师_梁老师_第二课时

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35:03

Grammar and usage-Present perfect continuous tense_单老师_三等奖_第一课时

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44:57

Passive Voice in Past Perfect Tense_徐老师_二等奖_第一课时

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33:48

Unit3 Present perfect continuous tense_第一课时

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00:39:40

Unit 3 Online tours_Grammar: Simple past tense and present perfect tense_张老师_第一课时_二等奖

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00:45:40

Unit 1 Past and Present_Grammar: Present perfect tense_乔老师_第一课时_二等奖

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00:35:07

Unit 1 Lifestyles_Lesson 1 A Perfect Day_刘老师_第一课时_特等奖

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00:43:57

Unit 1 Past and Present_Grammar: Present perfect tense_朱老师_第三课时_三等奖

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00:37:02

Unit 1 Lifestyles_Lesson 1 A Perfect Day_王老师_第一课时

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00:42:14

Unit 1 Lifestyles_Lesson 1 A Perfect Day_林老师_第一课时

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00:36:23

Unit 1 Past and Present_Grammar: Present perfect tense_徐老师_第一课时_二等奖

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00:53:30

Unit 1 Past and Present_Grammar: Present perfect tense_李老师_第一课时_三等奖

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