When was the tunnel opened to the public

A．The man and the woman are close friends.
B．. Hemingway is a coward because he committed suicide.
C．Hemingway's works have great influence on people.
D．The world created by Hemingway is full of tragedy and hopelessness.

A．Pay no attention to other's feelings.
B．In face of defeat they continue to fight with the despairing courage.
C．They cannot find the meaning of life.
D．They often have stoic endurance and fight in vain.