单选题 The warehouse manager has been unable to account ______ the missing supplies.
A. by
B. for
C. to
D. with

【正确答案】 B
【答案解析】固定搭配sb. accounts for sth.意思为“某人为某事作解释”。选项(A)by、选项(C)to和选项(D)with均不正确。