(单选题)

Which of the following is NOT a condition placed on receiving the discount? ( )

A.A guest must use a specific type of credit card to pay for a room.

B.The booking must be done well in advance of checking into the hotel.

C.The reservations must be carried out by calling the toll free number.

D.Guests must make their payments in cash.

参考答案：D

参考解析：

根据by using your American Express Corporate Card.可知预订房间享受折扣需要使用美国运通公司卡支付，选项A表述正确。根据An advanced reservation......is required to qualify for the discount.可知需要提前预定，选项B表述正确。根据 to be made by calling our toll free number可知需要拨打前台电话预定，选项C表述正确。选项D：顾客必须用现金支付，文中并未提到。故本题正确答案选D。

知识点：是非题英语阅读理解通用英语