In human there is a possibility of such as fever and headachesif there is exposure to the

问题补充：

In human, there is a possibility of such as fever and headachesif there is exposure to the virus.

A. symptoms

B. circumstances

C. consequences

D. exhibitions

答案：

(答案→)A. symptoms

B. circumstances

C. consequences

D. exhibitions

解析：名词辨析。A症状；B环境；C结果；D展览；句意：在人类身上，如果他们感染了病毒，就会有发烧头疼等等的症状。根据句意说明A正确。