第27题: [单项选择]A (knowledge) of several languages is essential to the study of comparative literature because (without them) one can read (only) (in) translation. A. knowledge B. without them C. only D. in 参考答案:B 答案解析:代词错误,应改为it。因为前面的主语是a knowledge,是单数,因此后面用让来指代它。