He ________ to school last week.[ ]
A. go
B. went
C. goes
D. going
答案:B
信用卡挂失手续费是()元。
A.10
B.20
C.5
D.0
若进栈序列为1,2,3,4,5,6,且进栈和出栈可以穿插进行,则可能出现的出栈序列为( )
A.3,2,6,1,4,5 B.3,4,2,1,6,5 C.1,2,5,3,4,6 D.5,6,4,2,3,1