单元综合检测九 适当形式填空 6.fell into 7.centuries 8.According to 9.divided into 10.is used for 单项选择 1-5 BAABB 6-10 BABDB 11-13 DDD 补全对话 1.When was it inventend 2.Who was it invented by 3.What was it used for 4.No it wasn't 5.How does it work 完形填空 1-5 CBABD 6-10 BCDBC 11-15 BACBD 阅读理解A 1-5 CABCB