I see you got a “D” in biology. _______ ?

—Well. I found that subject hard. I think I will drop it for history.

A．How about that

B．What for

C．How come

D．What’s your next plan

异常压力形成的机理主要有（）等。

A、压实作用；

B、水热增压；

C、构造运动；

D、火山运动；

E、渗透作用。