来自陆开上的问题
【Eachstudentandeachteacherisrequiredtosign____.Eachstudentandeachteacherisrequiredtosign________.AhisnameBtheirnames】
Eachstudentandeachteacherisrequiredtosign____.
Eachstudentandeachteacherisrequiredtosign________.
AhisnameBtheirnames

