2017年3月25日20：30～21：30为“地球一小时”熄灯环保活动，今年的活动主题是“蓝色WE来”。广东多家商场纷纷响应，助力环保事业。举行“地球一小时”熄灯环保活动对个人的意义在于（    ）

   I am Bill Jones. I am a teacher of English. My wife is Linda Jones. She is a nurse. We have a daughter and a son. We have many friends.
Look! These are my friends. This is Mr. Black. He is a worker. He works in a shoe factory He makes shoes there. That’s Mrs. Black. She is a worker on a farm near here. The girl is their daughter. She is a student. She is thirteen. The boy is their son. He is a young soldier（战士）. His name is Carl Black.