the student is sitting at his desk 为什么用at?

Jason is the most hard working student()all the student She is w_ some student student in the classroom The girl is a student.对a student提问 Who is the student over there?英语翻译 jake is the tallest a_____the three student. David is student in the school.翻译 The teacher is good ( ) her student. Who is the ______________(good) English student? What is the student's problems?改错 Lily is the student in red翻译 Jack is the teacher_______the student.怎么填? The student's classroom is new改错 the boy student is sincere 翻译下 This is the student's book和 This is the studentThis is the student's book和 This is the student is book 一个概念吗? The student in the front row is a top student.对in the front row提问 why is the student late?和 why is student late?有什么区别 为什么是Tom is a new student 而不是Tom is the new student The student is in the room.这个句型对吗?