---Perhaps we can’t arrive at the bus station on time．

---               ．We still have forty minutes．

A．Yes, you are right

B．Not at all

C．What a pity

D．Take it easy

一个两位数，把其十位数字与个位数字交换位置后，所得的数比原数多9，这样的两位数的个数有（   ）

A．0

B．1

C．8

D．9