His letter was so confusing that I could hardly make any of it.A. explanationB. senseC. m

问题补充：

His letter was so confusing that I could hardly make any of it.

A. explanation

B. sense

C. meaning

D. guess

答案：

A. explanation

(答案→)B. sense

C. meaning

D. guess

解析：考查短语：make sense of 理解/明白什么的意思，句意：他的信如此的令人困惑以至于我几乎不明白它的意思。所以选B。