I don’t know the meaning of the poem, because I have little ______with modern society. 

A ______ identification card is required when you purchase foreign money from the Bank of China.

That hero who died in the war was so brave that he never _____ to the enemies until death.

It was a long time before the Americans completely _________ from the shadow of the September 11th attack launched by the terrorists.

Scientists said the smaller the airborne particles, the more ______ they are to cause illness.