I have spared no efforts to remember the words, but all my work was______. A.in response B.in declin...
2022-06-11 08:40:06 56次 黑龙江大庆实验中学2019-2020学年高二下学期线上期中考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I have spared no efforts to remember the words, but all my work was______.
A.in response B.in decline C.in return D.in vain
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