(单选题)

—What do you mean when saying every minute counts?
—A man who dares to waste one hour of time ______ the value of life.

A.hasn’t discovered

B.hadn’t discovered

C.didn’t discover

D.isn’t discovering

参考答案：A

参考解析：

考查现在完成时。句意：“你说分秒必争是什么意思?”“一个敢于浪费一小时时间的人还没有发现生命的价值。”其一，根据句意可知，who dares to waste one hour of time充当先行词a man的定语从句；其二，根据问句可知后半句应使用现在时，且强调动作对现在的影响——至今还没有发现，因此应使用现在完成时。故选A。

知识点：

—What do you mean when saying every minute counts?—A man who dares to waste one hour of time ______ the value of life.

—What do you mean when saying every minute counts?
—A man who dares to waste one hour of time ______ the value of life.