题目内容：
Questions refer to the following letter.Customer Service Department
Northland Electronics Center
4022 First Street
Wellington
New Zealand
Dear Northland Representative,
I would like to share with you a positive experience I recently had with your company.
On February 4, I ordered a DVD player and two DVDs from your online store.The ____102____ delivery time was five business days, so I expected to receive the items no later than February 11.When this day came and my order had not arrived, I was upset.
I waited another week to ____103____ any unexpected postal delays, and then, on February 18, I emailed the Northland Customer Service Department about the problem.They responded
immediately with an apology and promised to resend the order by express delivery at no extra charge.I received it just two days later, on February 20.
I would like to _____104______ my gratitude to the Customer Service Department.You are a credit to your fine company, and you can count on my patronage for many years to come.
Sincerely,
Gavin Prigmore
___________ A．estimate
B．estimated
C．estimation
D．estimating
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