After the birth of my second child, I got a job at a restaurant. Having worked with an experienced【C1】______ for a few days, I was【C2】______ to wait tables on my own. All went【C3】______ that first week. When Saturday night came, I was luckily【C4】______ the tables not far from the kitchen.【C5】______ , I still felt it a little hard to carry the heavy trays (托盘). Before I knew it, the【C6】______ was full of people. I moved slowly,【C7】______ every step. I remember how【C8】______ I was when I saw the tray stand near the tables. It looked different from the one I was【C9】______ on. It had nice handles, which made it【C10】______ to move around. I was【C11】______ with everything and began to【C12】______ I was a natural at this job. Then an old man came to me and【C13】______ , "Excuse me, dear, my wife and I loved【C14】______you work. It seems your tray stand has been very【C15】______ to you, but we are getting ready to 【C16】______now, and my wife needs her【C17】______ back. " At first his【C18】______ did not get across. Then, I got it. I had set my trays on his wife' s orthopedic walker (助听器). My face was【C19】______ . I wanted to get into a hole and【C20】______ .
【答案解析】解析：本题考查上下文理解。上句中的luckily以及下句I still felt it a little hard to carry the heavy trays．可推断出此处是转折关系，however“然而”；finally“最后”；therefore“所以”；otherwise“否则，要不然”。故选B。