— Jimmy had a lot of parties recently.
— Yes, that might why he didn’t do well in the test.
A. sum up
B. add up to
C. account for
D. count on
网友回答
A. sum up
B. add up to
(答案→)C. account for
D. count on
解析：短语辨析. A.总结;B.合计达;C.说明……的原因；D.指望；依靠。句意，吉米最近参加了很多聚会。——是的，那可能说明了他这次考试不好的原因。选C。