The volunteers ________ a lot of work for the poor area since 2001. A.do B.did C.have done D.will do...
2022-08-30 05:23:42 80次 天津市20192020学年九年级上学期第一次月考英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
The volunteers ________ a lot of work for the poor area since 2001.
A.do B.did C.have done D.will do
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