There are no customers in the hotel. It have the friendliest service.A. can’t B. must C.

问题补充：

There are no customers in the hotel. It have the friendliest service.

A. can’t B. must C. may

答案：

解析：考察情态动词表示推测。根据上文所说宾馆里没有顾客，可以推测这家宾馆不可能有最友好的服务。Can’t不可能；故A正确。