An eye for an eye, and a tooth for a tooth.
Appearances often are deceiving.
Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.
——Martin Luther King Jr (1929-1968)
When Was Rome Built?
Teacher: When was Rome built?
Tom: At night.
Teacher: Who told you that?
Tom: You did. You said Rome wasn't built in a day.
He Knows the Answer
Teacher: Can you tell me anything about the great scientists of the 18th century?
Pupil: Yes, sir, I can. They are all dead.
Where do babies come from?
I asked my father where babies come from.
He says you download them from the Internet.
John didn't do his homework ____ his father came home from work.
D. just as
例句：Are the pipes of the sprinkler system in the basement or on the mezzanine floor?