2. 职称英语
  3. To: Roger Watkins(rwatkins@nex.net)From: Online Shops Unlimited(shop@xec.rrs)S

To: Roger Watkins(rwatkins@nex.net)From: Online Shops Unlimited(shop@xec.rrs)S

游客2025-06-13  35
问题 To: Roger Watkins(rwatkins@nex.net)
From: Online Shops Unlimited(shop@xec.rrs)
Subject: Account security
Dear Mr. Watkins,
Our records show that you tried to recover a【K1】______PIN number on August 30.
Please record your new PIN number and always keep it【K2】______. Remember that your PIN allows access to secure information. If you think someone else knows it, you【K3】______it immediately. Please feel free to call our customer service department with any further questions you might have.
Thank you,
Judy Severn,
Customer Service Director [br] 【K3】
选项 A、should change
B、did change
C、have changed
D、should have changed
答案 A
解析 通过分析时态或语义，很容易就能找到该题答案。因为if从句作为单纯条件状语从句提到了今后有可能发生的事情，所以主句不能用过去时态或现在完成时态。因此正确答案是(A)。
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