损伤性窒息最常见的原因是（）

A.胸部撞击伤

B.胸部摔伤

C.胸部暴力挤伤

D.胸部扑打伤

E.胸部高压气浪冲击伤

—How do you find the talk given by Mr. Smith
— （）.

A. Very well

B. Excited

C. Boring

D. Not at all