给下列句子选答语。(把正确的序号写在横线上)
1.A:Hello!
B:___________
①Hi! ②Bye.
2.A:Nice to meet you.
B:____________
①Nice to meet you, too.
②Hi, Danny.
3.A:How are you?
B.____________
①I'm fine, thanks. ②My name is Guo Yang.
4.A:What's his name?
B:__________
①Her name is Jenny. ②His name is Li Ming.
5.A:How many books do you have?
B.____________
①Good-bye. ②I have two books.