单项选择题In English, nouns, verbs, adjectives and ______ make up the largest part of the vocabulary, the open classes.
单项选择题Nation” as a free root can function alone in a sentence while diet is a ______, which can not function alone grammatically and has to combine with other morphemes to create new words.
单项选择题The short stories often with surprise endings such as The Gift of Magi and The Last Leaf” are written by ______.
单项选择题The English poets ______, Samuel Taylor Coleridge, and Robert Southey, were known as Lake Poets because they lived in the English Lake District in Northwestern England at the beginning of the 19th century.
单项选择题Which state of Australia is Melbourne in