I didn’t know I was spelling a word or even words existed.
A. that
B. what
C. which
D. one
网友回答
(答案→)A. that
B. what
C. which
D. one
解析：考查宾语从句。本题动词know后面有两个宾语从句I was spelling a word和that words existed。后面宾语从句的句子结构很完整，就使用that来引导。并且不能省略。因为当动词后面哟两个或者两个以上的宾语从句时，第二个宾语从句的引导词that是不能省略的。故A正确。