David worked hard at his lessons ____ he gained high grades in the exams. A．so that B．in order to C．...
2022-12-17 15:38:55 79次 2015届山西省高一12月月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
David worked hard at his lessons ____ he gained high
grades in the exams.
A．so that B．in order to C．though D．because
本题链接：
