______, a compound can be written as one word with or without a

______, a compound can be written as one word with or without a hyphen in between, or as two separate words.
A、Syntactically
B、Semantically
C、Orthographically
D、Phonetically
【正确答案】：C
【题目解析】：Orthographically，a compound can be written as one word with or without a hyphen in between, or as two separate words.