Unit01[In the library]、Unit02[Water sports]、Unit03[Make our world more beautiful]、Unit04[Travel]、Unit05[Have a good time!Unit 6 Mainly revision]、Unit07[A man who never gave up]、Unit08[Merry Christmas!]、Unit09[What is it made of?]、Unit10[When was it built?]、Unit11[Planting trees]、Unit12[Mainly revision]、Unit13[The worlds population]、Unit14[Shopping]、Unit15[A doctor for animals]、Unit16[The football match]、Unit17[The missing necklace] 、Unit18[Mainly revision]
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