They arrive ____________ 7: 00 in the evening. [ ]
A. in
B. at
C. on
答案:B
甲某曾经因为抢劫而服刑两年,他刑满释放后可以报考人民警察。( )
5,7,2,10,-1,13,()。
A.21
B.14
C.5
D.-4