单选题 Government reports, examination compositions, legal documents and most business letters are the main situations ______ formal language is used.
A. in which B. at what C. on which D. in that

【正确答案】 A
【答案解析】[解析] in...situation是固定搭配,作“在……情形下,在……场合中”讲。例如:We must crash both the interior and exterior enemies of the Republic, or perish with her. And in this situation, the first maxim of our policy should be to conduct the People by reason and the enemies of the People by terror. 我们必须击败共和国内外的敌人,不然就会与共和国同归于尽。在此情况下,我们政策的第一条,应当是依靠理智来管理人民,借助恐怖来统治人民的敌人。