单项选择题 A sound can change because of the influence of an adjacent sound. This is known as assimilation. Which of the following words is an instance of assimilation

单项选择题 Before the Roman invasion, the native inhabitants of Britain were.

单项选择题 In Old English the word girl can refer to a young person of either sex. Today it is restricted to "a young woman". This is an instance of ______.