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Unit 2
Being happy all year round
Unit 4
Let' s go for a walk
Unit 6
How tall are you?
Unit 8
Science makes our life easy!
Unit 10
Guess: What was happening at about 1: 30 yesterday aftemoon?
Unit 12
Always something interesting and nice to remember
Unit 14
Everything is fun
Unit 16
What's going to happen next?
阶段测评
Part 1
阶段测评
Part 2
阶段测评
Part 3
阶段测评
Part 4