6. (1) He seemed _____ everything, but in fact he knew nothing. A. to know B. to have known C. to k
问题描述：
6. (1) He seemed _____ everything, but in fact he knew nothing. A. to know B. to have known C. to k
答
seemed 表式 看起来,过去式.本句意指看起来他就已经知道所有事情,所以应为完成时态,而不是一般现在时态.故选B.