Question

Customers are asked to make sure that they ​______ the right change before leaving the shop.

Customers are asked to make sure that they ______ the right change before leaving the shop.
A.will give B.have been given C.have given D.will be given 答案是B，为什么？顺便再翻译一下。

Answer 1

解答：
have been done 是现在完成时。找零发生在离开商店的前面。
顾客被要求在他们确定正确找零后，离开商店。

Answer 2

意思是：客户被要求在离店前确认他们找零准确无误。

因为找零是被动的，而且是已经完成，所以选B