【题目】My brother is so interested in languages that, he is now learning _____ third language besides Eng-lish and French.
A.不填B.theC.aD.that
在线课程【答案】C
【解析】
考查冠词。句意：我弟弟对语言很感兴趣，他正在学习英语和法语之外的又一门语言。结合后文third language besides Eng-lish and French以及语境“英语和法语之外的又一门语言”可知此处为结构“不定冠词a / an + 序数词 + 名词”，强调在已知数量上再累加一个，翻译成“又一个”。故选C。