介词填空 who is____duty today?what class are you______?his father is a teacher ______NO.4middle schoolwelcome ______china,mr green
问题描述：
介词填空 who is____duty today?what class are you______?
his father is a teacher ______NO.4middle school
welcome ______china,mr green
答
who is 【on】duty today?
what class are you 【in】?
his father is a teacher【from】NO.4 middle school
welcome【to】china,mr green
【英语牛人团】倾情奉献,