Fill in the blank. (选择适当的句子填入空白处)
A: Hello. 1____
B: This is Sarah speaking. 2_
A: What's the matter?
B: 3_
A: I'm sorry to hear that. 4 _
B: Thank you. Are you having a good time?
A: Yes. 5 _
B: I want to come, too.
A. I hope you'll get better soon.
B. We are singing and dancing.
C. Sorry, I can't go to the party.
D. Who's that?
E. I have a cold.