1．My son is always praised by his teachers because he behaved (表现) well at school.
2．The Chinese people observe (庆祝) the Spring Festival from generation to generation.
3．The headmaster delivered (发表) an important speech at the meeting yesterday, which left a deep impression on his students.
4．The medicine should be kept in the shade (阴凉处), or they will lose effectiveness.
5．Because of his hard work, the boy has made much progress in his academic achievements (成就)．
6．As an educational specialist (专家), his grandmother is always invited to give lectures around the country.
7．He was left behind because of his sickness (疾病) when his classmates went camping.
8．In his childhood (童年), Li Ming lived a happy life though his family wasn't rich.
9．There is little connection (关系) between the two boys even though they look much alike.
