A university has always been a big headache for stray dogs on campus.
  In addition to sometimes barking at people unintentionally, some dogs will also run to the classroom during class and then lie in front of the podium. The bell rang during the school day. The students also entered the classroom one after another, when they saw a stray dog ​​wagging their tails and swaying into the classroom. When they saw the professor without lifting his head, he lay on his own before the podium. Then the professor could not bear to shout loudly: Quickly !Who drove the dog away, this class has already taken it!
  The first ray of sunshine
  Teacher: “When do you get up during the summer vacation?”
  Boy: “When the first ray of sunshine Shot into the window, when I was in the house. I got up.”
   Teacher: “Isn’t that too early?”
   Boy: “Oh. The windows of my house are facing west.”