A:on feet
B:by a school bus
C:on foot
D:by school bus
—He asked me _____ .
补全下面的对话。
A.Size 8,please.
B.These shoes are nice.
C.I will take them.
D.How much are they?
E.Here you are.
A:Can I help you?
B:Yes.____Can I try them on?
A:Of course.
B:____
A:OK.____
A:$50.
B:Here is the money.____
已知关于x的一元二次方程x2+k-1x﹣1=0有两个不相等的实数根,则k的取值范围是 ____