is known to us all things can easily go wrong when people are under.A. Which;controlB. As

问题补充：

is known to us all,,things can easily go wrong when people are under.

A. Which;control

B. As; load

C. It; strength

D. As; stress

答案：

A. Which;control

B. As; load

C. It; strength

(答案→)D. As; stress

解析：考查非限制性定语从句which和as的辨析。句意：众所周知，人们在有压力的情况下，做事容易出差错。依据句意后空stress合适，有逗号隔开it不能用；which不能放于句首。