The word "bead" originally meant prayer, but now it refers to the rosary used in the prayer. This is an example of______.

单项选择题It is in the year of ______ that Columbus discovered the New World.

单项选择题The poem A Psalm of Life was written by ______.

单项选择题The 18th century in English literature is an age of ______.

单项选择题The same one word may have more than one meaning. This is what we call ______.

单项选择题Which of the following is NOT Robert Frost's poem