Customers are asked to make sure that they the right change before leaving the s

 Customers are asked to make sure that they______ the right changebefore leaving the shop.

A.will give        B. have been given C. have given           D. will be given

试题答案

【答案】

 B

【解析】：根据题意看出这里两个动作“give the right change”和“leave the shop”的时间先后顺序，顾客要确保先找对了零钱再走开，所以找零钱应该用完成时态，而且很明显“找零钱”是被给，所以选B。

【考点】：完成时态的被动语态。

【易错点】：由于对语境的判断不准确，易错选C和A。

【备考建议】：时态的考查比较常见，要把句子中的动作的先后关系要理清楚。