Hello,Sun .Hello ,City 为什么S,C大写

hello, Hello Hello,Grandma.中的G为什么是大写的? Hello!Who's speaking? What's "Hello girl"? What's hello? Hello!My name is Andy.-------()A.hello B.What's your name C. Let's ____ to our teather.A.say hello B.says hello C.saying Hello!I’m Cindy’s Chinese teacher Sun Tong.I’m 22 years old. Hello! I’m Cindy’s Chinese teacher Sun Tong. I’m 22 years ol 英语翻译(1)Hello SongHello,hello,hello,hello,come on,let's sing -Hello, who’s that speaking?