— May I go to the concert with you?— I’m afraid not you have a ticket because I have onl

问题补充：

— May I go to the concert with you?

— I’m afraid not you have a ticket, because I have only one.

A. unless

B. since

C. if

D. though

答案：

(答案→)A. unless

B. since

C. if

D. though

解析：

试题分析: 句意:我可以和你一起去音乐会吗？恐怕不可以，除非你有票，因为我只有一张票。unless 除非，since自从，既然，if如果，though尽管。根据语境可知是除非他有一张票，才可以跟他一起去，故答案选A.