阅读下面短文，撑握其大意，然后从1—20各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
After the birth of my second child, I got a job at a restaurant. Having worked with an experienced  1  for a few days, I was   2  to wait tables on my own. All went  3   that first week. When Saturday night came, I was luckily  4  the tables not far from the kitchen.   5   , I still felt a little hard to carry the heavy trays (托盘)。
Before I knew it, the  6  was full of people. I moved slowly,   7  every step. I remember how  8   I was when I saw the tray stand near the tables, it looked different from the one I was  9   on. It had nice handles (手柄)，which made it  10   to move around. I was pleased with everything and began to  11  I was a natural at this job.
Then, an old man came to me and said, “Excuse me, dear, my wife and I loved __12  you work. It seems your tray stand has been very  13   to you, but we are getting ready to  14   now, and my wife needs her  15  back.”
At first his   16  did not get across. “What was he talking about!” Then I got it. I had set my trays on his wife’s orthopedic walker (助步器). I stood frozen as ice, but my face was  17  . I wanted to get into a hole and  18  .
Since then, I have learned from many mistakes such as the one I just   19   , I have learned to be more  20  and not to be too sure of myself.

A．manager B．assistant C．cook D．waitress

A．promised B．invited C．allowed D．advised

A．well B．quickly C．safely D．wrong

A．left B．given C．brought D．show

A．Therefore B．However C．Otherwise D．Finally

A．kitchen B．street C．restaurant D．table

A．minding B．changing C．taking D．saving

A．fixed B．trained C．loaded D．waited

A．slower B．lighter C．quieter D．easier

A．believe B．agree C．regret D．pretend

A．letting B．making C．watching D．having

A．useful B．familiar C．unusual D．interesting

A．rest B．order C．eat D．leave

A．bag B．walker C．tray D．coat

A．idea B．praise C．message D．need

A．cold B．full of joy C．pale D．on fire

A．lie B．hide C．defend D．stay

A．repeated B．discovered C．corrected D．described

A．careful B．patient C．honest D．practical