— Are you sure the delegation will come to our school next week?

— _____. The head of it has just emailed me about the departure time of their flight.

A．No wonder.

B．You bet.

C．Don’t mention it.

D．Definitely not.

五行中，"金"的"所不胜"之行是（）

A.金

B.木

C.水

D.火

E.土