51 B
One day Linda saw an advertisement in a magazine.
52 A
“A month ago I sent you a postal order for $10 as payment for 100 stamps.They haven’t arrived.Please send them right away.”
53 D
You gave me no answer.If you do not send me the stamps,I shall report this issue to the authorities.”
54 B Issue=Matter=事情
55 D
Two days later,Linda received the stamps in the mail.