◎ 题干
____ the end of last year, I have been working on the project, and it is progressing well.
[     ]
A. Since
B. By
C. At
D. In
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“____ the end of last year, I have been working on the project, and it is progressing well. [ ]A. Since B. By C. At D. In …”主要考查了你对  【介词和介词短语】【现在完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。