1 . 根据短文内容，从下面所给的选项中，选出能填入空白处的最佳选项。
A: Good morning, Jane.
B:     1    
A: Oh, Jane, this is my sister Kate.     2    
B: Nice to meet you, Jane.
A:     3     Are those your parents?
B:     4    
A: Oh, I see. Well, have a good day!
B:     5    

A．Yes, they are.

B．Thanks! You, too.

C．Nice to meet you, too.

D．Kate, this is my friend Jane.

E．Good morning, Sally.