For the young should be showed to their parents teachers and old people.A. respectB. se

问题补充：

For the young, should be showed to their parents, teachers and old people.

A. respect

B. seriousness

C. laugh

D. laziness

答案：

A. respect

B. seriousness

(答案→)C. laugh

D. laziness

解析：本题的含义为对于年轻人而言应该用微笑面对他们的父母，老师和老人，laugh可以笑的意思，故本题选C。