The symbolic connection between sound and meaning is almost always （ ）.
A、motivated
B、arbitrary
C、logical
D、unconventional
【正确答案】：B
【题目解析】：The symbolic connection between sound and meaning is almost always arbitrary.声音和意义之间的象征性联系几乎总是任意的。A选项“有动机的”，C选项“合逻辑的”，D选项“非传统的”均不符合题干要求，故答案为B，arbitrary（任意的）。
