______ is the branch of linguistics that deals with the origin and historical development of a linguistic form.

单项选择题______ is a way in which the meaning of a word can be dissected into meaning components called semantic features.

单项选择题Most Australians live on the cool, wet, forested ______.

单项选择题Which is the main idea of the passage

单项选择题According to the passage, one solution to the extinction of many fish species is that ______.

单项选择题It can be inferred from the first paragraph that ______.