—Jimmy had a lot of parties recently.—Yes that might why he didn't do well in the test.A

问题补充：

—Jimmy had a lot of parties recently.

—Yes, that might why he didn do well in the test.

A. turn up

B. add up to

C. account for

D. make sense of

答案：

A. turn up

B. add up to

(答案→)C. account for

D. make sense of

解析：考查词组：A．turn up出现，露面B．add up to共计是C．account for是…的原因D．make sense of理解，句意：--吉姆最近参加很多会议。--是那可能解释他为什么考试考不好的原因。选C。