题目内容

_______ the math problem is very difficult, _______ some students can still work it out.

[  ]

A.Although, but

B.Although,/

C.But,/

D./, so

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网