译文
背·英文
课文
4 Lesson 1 Finding fossil man 2020-12-14
3 Lesson 2 Spare that spider 2020-12-14
2 Lesson 3 Matterhorn man 2020-12-16
4 Lesson 4 Seeing hands 2020-12-15 2020-12-17
3 Lesson 3 Matterhorn man 2020-12-14 2020-12-16
2 Lesson 2 Spare that spider 2020-12-13 2020-12-14
1 Lesson 1 Finding fossil man 2020-10-03 2020-12-14
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