When we catch cold, how does our body work hard? A．Our runny nose stops our breath. B．Our temperature rises to make us feel miserable． C．Our blood rushes into our cells. D．Our nose, fever, and blood work together to kill virus.

A.Our
B.Our
C.Our
D.Our

【参考答案】

D
第二段说明我们身体自身的保护能力。流鼻涕、发烧都是为了杀死病毒。