阅读下列短文，从每题所给的四个选项 (A.B.C和D)中选出最佳选项，并在答题卡上将该项涂黑。

　　A

　　As my train wasn't due¹ to leave for another hour, I had plenty of time to spare. After buying some newspapers to read on the journey, I made my way to the luggage office to collect the heavy suitcase I had left there three days before. There were only a few people waiting, and I took out my wallet to find the receipt² for my case. The receipt didn't seem to be where I had left it. I emptied the contents of the wallet, and railway-tickets, money, scraps³ of paper, and photographs fell out of it; but no matter how hard I searched, the receipt was nowhere to be found.

　　When my turn came, I explained the situation sorrowfully to the assistant. The man looked at me uspiciously as if to say that he had heard this type of story many times and asked me to describe the case. I told him that it was an old, brown-looking object not different from the many cases I could see on the shelves. The assistant then gave me a form and told me to make a list of the chief contents of the case. If they were correct, he said, I could take the case away. I tried to remember all the articles I had hurriedly packed and wrote them down as they came to me.

　　After I had done this, I went to look among the shelves. There were hundreds of cases there and for one dreadful⁴ moment, it occurred⁵ to me that if someone had picked the receipt up, he could have easily claimed the case already. This hadn't happened fortunately, for after a time I found the case lying on its side high up in a comer. After examining the articles inside, the assistant was soon satisfied⁶ that it was mine and told me I could take the case away. Again I took out my wallet: this time to pay. I pulled out a ten-shilling note and the "lost" receipt slipped⁷ out with it. I couldn't help blushing⁸ and looked up at the assistant. He was nodding his head knowingly, as if to say that he had often seen this happen before too!

　　56. The underlined⁹ words "to spare" probably means(    ).

　　[A] to show mercy¹⁰ to

　　[B] to leave over or more than you need

　　[C] to be free

　　[D] to use in a small quantity

　　57.Why did the go to the luggage office?

　　[A] He went there to get his case.

　　[B] He went there to see a friend.

　　[C] He went there to buy something to eat.

　　[D] He wanted to ask when the train was leaving.