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.

早期的重商主义的理论主张是（）。

A、黄金差额论

B、贸易差额论

C、货币差额论

D、贵金属差额论