A:-10
B:10
C:-11
D:11
山东省简称“鲁”,山西省简称“晋”,这些简称源于西周实行的( )
用适当的介词填空
(1)He was born____ a cold morning.
(2)The girl began to learn to play the piano____ an early age.
(3)The beautiful music was____ Gu Jianfen.
(4)We often watch concerts____ TV.
(5)The boy can play all types____ instruments(乐器).