---Bob looks upset. What has happened to him?
---Perhaps his failure to the exam his low spirits.
A. accounts for
B. looks for
C. makes for
D. takes for
网友回答
(答案→)A. accounts for
B. looks for
C. makes for
D. takes for
解析：动词短语辨析。A解释…原因，占据；B寻找；C有利于,朝…过去；D认为… 结合句意可知A正确。句意：他考试失败让他情绪低沉。