38. The writer says "Laughter is like medicine" because ……………………..
A. it makes others laugh too.
B. it helps you make friends.
C. it helps people live longer.
39. You can get knowledge and experience by……………………………
A. visiting new places. B. loving other people. C. laughing more often.
40. The best title for this passage is “………………………….……..”
A. Live to be happy.
B. Laughter is the power of happiness.
C. Happiness is hard to find.