一句话幽默类：
I had to go to Amsterdam last week for a conference. I arrived at the airport in plenty of time and checked in, but I only had one small case so I decided to take it on the plane as hand luggage. As the flight was not due to board for 45 minutes, I went to a cafe, sat down, and ordered a cup of coffee.
While I was sitting there drinking my coffee and reading the paper, I was vaguely aware of a woman and her child coming to sit at the next table. I did not pay much attention to them, though, and when my flight was called I reached for my case and left.
An hour later, the plane was in the air and I decided to look at the conference programme to see what I wanted to attend. Imagine my horror when I opened the case and found that it was full of picture books and children's toys—
B) Important documents.
C) Food and coffee.
D) Clothes and scientific papers.
