— Where _____ you buy the T-shirt?
— I ______ it in Beijing.
A:have; bought
B:did; buy
C:do; bought
D:did; bought
蒙古族主要分布的省级行政区域是( )
秦、汉、唐都有过大规模迁徙富豪,使他们的田产一律化为乌有的事情。宋代一改此法,“不抑兼并”、“不立田制”。据此可知,宋代( )