Cười nào, mỗi ngày một chuyện cười chăng,^^

Two friends talked with each other. The first one said:
- Next week, on March, Seventh, will you please come to my house for dinner.
The second one replied:
- I'm sorry! I will be sick on that day.
His friend was surprised:
- Now, you are very healthy. How do you know exactly you will be sick on that day? It's too strange!
- Because the day next to that day is March, Eighth, and my wife only likes expensive presents.

The teacher said to his students:
- Knowledge is the golden key that helps us opening all doors in the life.
Teo, a lazy student was looking out off the window. The teacher called him suddenly and asked:
- Teo, what do you think about the sentence that I have told just?
Teo stood up and replied:
- Teacher, I think that I will bring the golden key to the jewellery shop and sell it. Afterwards, I will hire a locksmith in order that he will help me opening all doors.