In the historical development of language, sound change is inevi

In the historical development of language, sound change is inevitable, such as sound loss, sound a______ and sound movement.
【正确答案】：addition(P133)解析:英语从古英语到现代英语过渡的漫长岁月里,在语音方面曾经历过一些重要的变化,这些变化是系统的、有规则的。这些变化包括元音方面的变化及语音方面的丢失、增加和位移等。