单选题
The head of the sales department is required to have at least 7 years of experience in ______ sales and 4 years of management experience.
【正确答案】
D
【答案解析】[解析] 词汇：名词
1．空格内要填入一个和名词sales相搭配的词。retail可作名词、动词以及形容词。
2．retail sales是一个复合名词，意为“零售业”，因此D为正确选项。