___________oflasttermwe___________overtwothousandnewwords.
A.At the end; had learnedB.In the end; learnedC.By the end; have learnedD.By the end; had learned在线课程D
解析：
这题的第一空填by the end of“到…结束为止”，后面接的是last week“过去时间”，所以句子用过去完成时，句意是：到上学期末为止，我们已经学习了2000多个生词。选D。