Unit 9 When was it invented? 1
单元评价我巩固 5
Unit 10 By the time I got outside,the bus had already left 11
单元评价我巩固 17
Unit 11 Could you please tell me where the restrooms are? 23
单元评价我巩固 27
Unit 12 You're supposed to shake hands 33
单元评价我巩固 38
Unit 13 Rainy days make me sad 45
单元评价我巩固 49
Unit 14 Have you packed yet? 56
单元评价我巩固 61
Unit 15 We're trying to save the manatees! 68
单元评价我巩固 73
期中评价我提高 79
期末评价我前进 83
参考答案 87