[填空题]The reason, why we are touched by the sound of music is that we human beings have________________.

[填空题]The reason, why we are touched by the sound of music is that we human beings have________________.

[填空题]Nobody really knows the reason why we sleep.

[填空题]The reason why we should be eating more fish is that ______.

[单项选择]There are a number of (reason) why population (is concentrated) in the regions, but the wide variety and (availability) of animal and vegetable life may be (the most important).（）
A. reason
B. is concentrated
C. availability
D. the most important

[单项选择]The reason (why) I came late (for) the meeting was (because) my car (broke down).（　）
A. why
B. for
C. because
D. broke down

[填空题] Why We Laugh
We start finding things laughable — or not laughable — early in life. An infant first smiles at approximately eight days of age. Many psychologists assume this is his first sign of simple pleasure— food, warmth and comfort. At six months or less, the infant laughs to express complex pleasures—such as the light of Mother’s smiling face.
Between the ages of six months and one year, the baby learns to laugh for essentially the same reasons he will laugh throughout his life, says Dr. Jacob Levine, associate professor of psychology at Yale University. Dr. Levine says that people laugh to express mastery over an anxiety. Picture what happens when a father throws his child into the air. The child will probably laugh—but not the first time. In spite of his enjoyment of "flying", he is too anxious to laugh. How does he know Daddy will catch him Once the child realizes he will be caught, he is free to enjoy the ga