2019年12月英语四级真题与答案解析（第一套） _第2页

　　36:E 段落第一句: USPS has sophisticated emergenc

　　37:Ⅰ段落第一句: Mail companies are logistics

　　38:C 段落第一句: As global surface temperatures in

　　39∶G 段落第一句: Every day, USPS processes, on a

　　40:K 段落第一句: Rebuilding can take a long time

　　41:F 段落第一句: As soon as it' s safe enough to b

　　42:B 段落第一句: Even the united states postal

　　43:J 段落第一句: Private courier companies, wh

　　44:D 段落第一句: Days after the deadly2017 wild

　　45:H 段落第一句: It can be hard to identify which parcels are carrying crucial items