【题目】The campaign is ________ only partially successful, so we have to keep on working hard.
A. at lastB. at latestC. at least D. at best
在线课程【答案】D
【解析】句意：这场战役充其量仅仅取得阶段性成功，因此我们必须继续努力。at last最后；at latest最近；at least至少；at best充其量，最多。根据题干中的only partially判断。故选D。