单选题 Every director needs an assistant that he can ______ to take care of problems that may occur in his absence.
【正确答案】 C
【答案解析】[解析] 本题考查动词短语。count on“依靠，依赖”；account for“对…做出解释”。句意为：每位主管都需要一名他能信赖的助手，在他不在的时候替他处理可能出现的问题。