A、An hour before. B、Three hours before. C、One day before. D、Three days before. D 文中提到“I made my way to the luggage office to col

As my train was not due 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 my suitcase I had left there three days before. There were only a few people waiting. I took out my wallet to find the receipt for my case. Unfortunately, it was nowhere to be found.
    When my turn came, I explained the situation sorrowfully to the assistant. He then handed me a form and told me to make a list of the chief contents of the case. Only when they were correct could I take the case away. I racked my brain trying to remember all the articles I had packed in a hurry. After I had filled out the form, I went to look among the shelves. There were hundreds of cases and for one dreadful moment I began to worry that someone might have already claimed my case. To my great relief, the case was lying on its side high up in a corner. After I had examined the items inside, the assistant told me to 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 flipped out with it. Blushing, I looked up at the assistant. He was nodding his head knowingly, as if to say that he had often seen this happen.