[单项选择]L、M和N三个人中的每一个人都从一街头小贩那里至少买一种食物，该小贩仅售F、H、P和S四种食物。他们根据以下条件来选择他们的食物：(1)每个人最多只买每种食物的一份；(2)若三个人中的某个人买了H，则他不买S；(3)至少有1个人买了H，至少有1个人买了P；(4)M买了S；(5)N买了F；(6)L和N不买P：(7)M和N不买同样的食物。下面哪项陈述一定正确
A. L买了H。
B. L买了S。
C. M买了H。
D. M买了P。

Humour, which ought to give rise to only the most light-hearted and gay feelings, can often stir up vehemence and animosity. Evidently it is dearer to us than we realize. Men will take almost any kind of criticism except the observation that they have no sense of humour. A man will admit to being a coward or a liar or a thief or a poor mechanic or a bad swimmer, but tell him he has a dreadful sense of humour and you might as well have slandered his mother. Even if he is civilized enough to pretend to make light of your statement, he will still secretly believe that he has not only a good sense of humour but are superior to most. He has, in other words, a completely blind spot on the subject. This is all the more surprising when you consider that not one man in ten million can give you any kind of intelligent answer as to what humour is or why he laughs.
One day when I was about twelve years old, it occurred to me to wonder about the phenomenon of laughter. At first I thou
A. People don't like to be considered as one with no sense of humour.
B. People will give you a satisfactory answer to what humour is.
C. People would like to be a liar or a coward.
D. People can make light of other's comment on their sense of humour.