—You look pale. What's wrong with you?

—I _____ terrible. I think I have the flu.[ ]

A. feel

B. felt

C. doing

D. going

行为人在实施不纯正不作为犯罪时，其罪过( )。

A．只能是故意

B．只能是过失

C．既可以是故意，也可以是过失

D．只能是间接故意