观察下列图片，从中找出一个正确答案，使它们呈现出一定规律。（）

A.A

B.B

C.C

D.D

Could you tell me _____?

A．how long will the new teaching building be completed

B．how soon the new teaching building will be completed

C．how long the new teaching building will be completed

D．how far will the new teaching building be completed