问题补充：
He has behaved in the most extraordinary way recently. I wonder what can his actions.
A. account for
B. answer for
C. search for
D. reach for
答案：
(答案→)A. account for
B. answer for
C. search for
D. reach for
解析：句意：他最近的行为非常特殊，我纳闷什么能解释他的行为。account for对……做出解释；answer for因……而惩罚；search for寻找；reach for去取。根据句意故选A。
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