Module 1 Wonders of the world
Unit 1 It's more than 2，000 years old.
Unit 2 The Grand Canyon was not just big.
Unit 3 Language in use
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Module 2 Public holidays
Unit 1 My family always go somewhere interesting as soon as the holiday begins.
Unit 2 We have celebrated the festival since the first pioneers arrived in America.
Unit 3 Language in use
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Module 3 Heroes
Unit 1 She trained hard，so she became a great player later.
Unit 2 There were few doctors，so he had to work very hard on his 0wm.
Unit 3 Language in use
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Module 4 Home alone
Unit 1 I can look after myself，although it won't be easy for me.
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