单选题 Every director needs an assistant that he can ______ to take care of problems that may occur in his absence.
A. count on B. count for C. count down D. count out

【正确答案】 A

【答案解析】固定短语。count on/upon sb．to do sth意为“依靠(指望、期待)某人做某事”；count for分别与little，mach，nothing构成固定短语，即count for little(简直无足轻重)，count for much(关系重大)，count for nothing(毫无价值)； count down意为“(准备发射导弹等之前)倒计时”；count out意为“点…的数”。句中的take care of意为“处理”。根据题意，A正确。