Our headteacher____for months to make sure that we understand the importance ofconcentration. A. tri...
2022-09-04 07:10:21 48次 江苏省南京市2018-2019学年高一上学期期末调研（含听力）英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Our headteacher____for months to make sure that we understand the importance ofconcentration.
A. tried B. was trying C. has been trying D. is trying
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