单项选择题______ is a mild, indirect or less offensive word or expressive one, so it is usually the substitution for taboo.
单项选择题______ refers to the extensive sound changes affecting vowels between 1400 and 1600.
单项选择题The hero who has fallen a victim to his own ambition must be ______.
单项选择题The avenger in the novel The Scarlet Letter is ______.
单项选择题______ is Britain's established Church.