intermediate grade billet

例句：

1. 1. The teacher assigned us intermediate grade billets to complete before the exam.
   老师给我们分配了中间年级的作业，要在考试前完成。
2. 2.The student's performance in the final exam was disappointing, but he managed to complete his intermediate grade billets.
   学生在期末考试中的表现令人失望，但他还是完成了他的中间年级作业。
3. 3. The student's parents were concerned about their child's lack of progress in completing intermediate grade billets.
   学生的家长担心他们的孩子在完成中间年级作业方面没有进步。