是after 10 to 15 days还是in 10 to 15 days

是after 10 to 15 days还是in 10 to 15 days 一道英语奥数题there is a road to be repaired.A needs 10days to finish,B needs 12days and C needs 15days .Now they work together to mend the road.A left halfway,in the end ,they spent 6days finishing the road.After A left,find out how many days consider definitions file outdated after 10 days the day after tomorrow 间接引语到底是two days later还是two days after?why? we are going to shanghai after two days. after 2 Days,after 7 Days分别是指哪一天?如果今天是20日,那么after 2 Days,是明天,还是后天,是几号?after 7 Days,是哪天?有没有 after 1 Days 这样的说法? 帮忙看一下这两句话的意思上的区别.Documents must be presented to the bank after 15 days after shipment dateDocuments must be presented to the bank within 15 days from the shipment date 请问My mother will return to Shanghai________.A.in two day’s B.after two days’ C.in two days’time D.after two day’s time答案是C.为什么是C. After three days he went to the mountains(改为将来时态)______ three days he is ____ to the mountai. 10 DAYS TO WAR怎么样 After ten days' walk,they got back to their hometown finally.(改为同义句)___ ___ ___ ,they got back to their hometown after ten days' walk. when did you go to the school?A two days beforeB two days agoC for two days D after two dayswhen did you go to the zoo? a little girl was l___ for a few days and found to be dead after ten days I hear he's coming to see youA:for three daysB:after three daysC:three days agoD:in three days 英语翻译Serological response after vaccination was evaluated by Rose-Bengal Plate Test,Serum agglutination test and complement fixation tests.The antibody activity began to increase 15 days after vaccination and started to decrease gradually two he is leaving for shanghai _____time to have a meeting.A.in three day's B.after three day's C.after three days' D.in three days' Mary went to look after her grandpa in the hospital( )要语法 A.befor two days B.in two days C.two days ago two days after和after two days的区别