Companies often ______ mystery shoppers to inspect their service

Companies often ______ mystery shoppers to inspect their service.
A、rent
B、employ
C、hire
D、take
【正确答案】：B
【题目解析】：rent 租借；employ 雇佣；hire 聘用；take 拿；句意：公司经常雇佣神秘顾客来检查他们的服务。employ sb to do sth 雇佣某人做某事