______ 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.

单项选择题The following languages belong to Indo-European Language Family EXCEPT ______.