单项选择题The United Kingdom is also known by its official name ______.
单项选择题Of the following poets, ______ is NOT a romantic poet.
单项选择题William Sidney Porter, known as O. Henry, is most famous for ______.
单项选择题______ studies the total stock of morphemes of a language, particular those items which have clear semantic references.
单项选择题The United Nations Conference was held to discuss ______.