1-5 ACCBA 6-10 BBACB11-15 ACABC 16-20 BABCA21-25 CBAAB26.March 27.violin 28.six / 6 29.best 30.hearts31-35 CDBAD 36-40 CBCCB41-45 DCBBA 46-50 ACDDB51-55 ACDDC 56-60 BBCDA61-65 CDBDA66.our own mothers67.They found that children could tell their mothers' voices at once.68.They / The babies feel comfortable and excited.69.Hearing their mothers' voices makes children's brains more active.7-.它们（妈妈的声音）比我们周围的任何声音都美妙/好听。71.experiences 72.ninth 73.an 74.saw 75.handed 76.why 77.with 78.safely 79.him 80.harder81.Don't be late again82.Do you like to make friends83.What brave doctors they are84.How does she arrive home on time85.China is famous for the rich cultureOne possible version:After graduation, I want to have lunch with Mrs Zhang,my headmaster in my primary school. She was my first teacher who loved us like a mother. She taught me a lot, such as how to learn, how to develop a good study habit and how to be a man.During the lunch time, I want to thank her for her six-year teaching. We can recall the good time of primary school and talk about my classmages together.After lunch, if time permits I'll ask for her advice for us teenagers today.
