呼吸衰竭患者缺氧的典型表现是（） A.呼吸困难 B.呼吸急促 C.痰量明显增多 D.

     As my train was delayed for two hours, I had plenty of time to spare. After buying some
newspapers to read on the journey, I made my way to the__1__office to collcct my heavy
suitcase I had __2__there three days before. Thcrc were only a few people__3__, ancl 1
took out my wallct to find the receipt for my case. The receipt didn't seem to bc where I
had left it.__4__the contents, and railway tickets, money, scraps of paper and photos fell
out of it; but no matter how__5__Isearched, the receipt was nowhere to be found.
     When my turn came, I__6__the situation sorrowfully to the assistant. The man looked
at me__7__as if to say that he had__9__this kind of story many times and asked me to
__10__the case.I told him that it was an old, brown looking__11__no different from the
many cases I could see on the shelves. The assistant then gave me__12__and told me to
__13__of the chief contents  of the case. If they were__14__, he said, I could take the
case away. I tried to _15__all the articles I had __16__packed into the case and wrote
them down as they
came to me.
     After I had done this, I went to__17__among theshelves. There were hundreds of cases
there. For one dreadful moment, it__18__to me that if someone had 33the receipt up he
could have easily claimed(认领) the case already. This hadn't happened__19__' for after
a time I found the case lying in a corner. After examining the
articles inside, the assistant was__20__and told me I could take the case away.