单选题 It is known to all linguists that intonation and tone of voice are clearly not reproducible in existing ______ systems, but part of the skill of a novelist or a reporter is to convey these features of speech in his descriptions.
【正确答案】 A
【答案解析】[解析] 该句讲的是言语的声调和拼写，而空后的system是在讲拼写系统，所以答案无疑是A。