第一次完成全国统一大业的少数民族是 [ ]
A．匈奴
B．突厥
C．蒙古
D．满族
答案：C
__________ homework did we have to do that we had no time to take a rest.
A．So much
B．Too much
C．Too little
D．So little
（）商标可以获得跨类保护
A.知名
B.著名
C.驰名
D.国际驰名
