______ the maths problem is difficult， I'll try very hard to work it out. A．Though B．When C．Before D...
2022-11-28 23:37:19 17次 2014-2015学年初三中考专项突破英语试卷7（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
______ the maths problem is difficult， I'll try very hard to work it out.
A．Though B．When
C．Before D．After
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