()did the 2010 World Expo(世博会)last?-----------For six months.A.How often B.How long C.How soon
问题描述:
()did the 2010 World Expo(世博会)last?-----------For six months.A.How often B.How long C.How soon
答
B 问多长时间,表持续,应用how long ,回答中用for + 时间
A 问的是频率; C 多久