单项选择题In a true sense, plateways are the earliest and most primitive railways invented by ______.

单项选择题Ernest Hemingway was most famous for ______.

单项选择题Gender is mostly a category of the noun and pronoun. In English, the gender distinctions are determined ______; in French, they are ______.

单项选择题Apart from the majority of countries, the U.K. has ______ to form the whole part of its constitution.

单项选择题_______ is meant that a Conversational implicature is attached to the semantic content of what is said, not to the linguistic form.