HiJackDoyouknowwhatt的精选

问题详情：补全对话 A：Hi,Jack.DoyouknowwhattheFourInventionsare? B:Yes,IhavejustlearnedaboutthemfrommyChineseteacher.1  A: 2  B:Theyweregreatinventionsatthattime. 3 Theyaregreatgiftstotheworldfro...