目录：
Unit 1 A family outing
Unit 2 Some stories are more interesting
Unit 3 We should learn to take care of ourselves
Let’s Know More
Assessment Ⅰ
Unit 4 Planting trees is good for us
Unit 5 Our earth looks like this in space.
Unit 6 Anne wanted to dance
Assessment Ⅱ
Unit 7 I’m not afraid!
Unit 8 International Children’s Day
Unit 9 Look at these beautiful places in the world
Assessment Ⅲ
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