—Where have you been, David? You're late for class again.

—________ My bus got caught in a traffic jam.

A．Yes, so what?

B．Well, how come?

C．Sorry, but I couldn't help.

D．No, it's not my fault.

腹部内脏脱出伤员搬运时正确的是（）

A.使伤员仰卧担架上

B.使伤员双腿屈曲位

C.使伤员腹肌放松

D.先将脱出的内脏送回腹腔

E.腹部保温