Unit1 The summer holidays Unit2 In the lab Unit3 American English Unit4 Travel Unit5 Why do you do that? Unit6 A new factory Unit7 Earthquakes …… 第一学期期末综合测试 Unit15 Healthy eating Unit16 Fire! Unit17 Nature Unit18 The necklace Unit19 Jobs Unit20 Mainly revision …… 第二学期期末综合测试 参考答案 · · · · · · (收起)