—Jack can't concentrate on his lessons recently.—Yes that might why he did so badly in

问题补充：

—Jack can concentrate on his lessons 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

答案：

A. answer for

B. apply for

C. call for

(答案→)D. account for

解析：考查词组：A. answer for为…负责，B. apply for申请，C. call for要求，需要，D. account for 占据，是…的原因，句意：--杰克最近上课不是很专心。--是，这可能就是他上次考试差的原因。选D。