补全对话：根据对话内容，从方框中选择适当的选项补伞对话，其中有两项为多余选项。

W:  Good morning, English Department Office.   小题1:

M:  Good morning. May I speak to Professor Smith, please?

W:     小题2:

M: Alright.

W:  I'm sorry he is at an important meeting right now.

M:  Oh, I see.    小题3:

W:  Yes, surely.

M:    小题4:  My name is Jack.

W:  Could I have your telephone number, please?

M:  My home telephone number is 9796453.

W: 9796453.

M:  My cell phone number is 13010984563.

W: 13010984563. 小题5:

M:  Thank you very much.

W:  Not at all.

投保人支付保险费的义务是确定的，但是得到保险赔偿或给付是不确定的，这一描述说明保险合同是（）

A.射幸合同

B.附合合同

C.双务合同

D.有偿合同