Speech fusion: refers to the phenomenon that the two people's voices that are frequently communicated gradually converge under a completely unconscious situation. Which of the following are speech fusions? ['Mr. Lou has lived overseas for many years and rarely uses Chinese, let alone speaks his hometown. At a dinner party, he met a fellow villager, and the phrase "stubborn" evoked the long-forgotten local accent. The two spoke in their hometown. Chat all night.', 'Lao Zhang and his wife have been married for more than ten years. The eating habits of the family have been indistinguishable from the north and the south. Even Mr. Zhang\'s northeast cavity has almost lost its original taste. His wife\'s Cantonese sounds strange, daughter. Often make fun of them as real "singing husband and wife".', 'Ms. Zhu ’s Chinese speaking class is loved by international students. Not only is the pronunciation standard and the tone soft, but she also talks about some interesting short paragraphs in the classroom from time to time. In less than half a year, most students can learn her tone for daily routine Conversation.', "After Xiao Huang came to work in a small coastal town in the south, she insisted on watching local dialect TV programs every day, imitating the announcer's pronunciation. After half a year, her tone, tone, and words sounded like a native native."]