---Jack can't concentrate on his study recently．
--- Yes, that might why he did so badly in the last test．
A. answer for
B. apply for
C. call for
D. account for
网友回答
A. answer for
B. apply for
C. call for
(答案→)D. account for
解析：动词短语辨析。A对…负责；B申请；C要求；D解释。占据…比例；句意：—最近在学习方面Jack不能集中注意力。—是的，也许这就可以解释为什么在上一次的考试中他表现的很糟糕了。故Ｄ正确。