成人英语三级考试

【单选题】Mr. Hall understands that ______ math has always been easy for him, it is not easy for the students.


A．unless
B．since
C．although
D．when

网考网参考答案：C
网考网解析：
[考点] 让步状语从句 [解析] although“尽管”。 查看试题解析出处>>