I was in charge of grading all the problem sets that were assigned as homework.
问题描述：
I was in charge of grading all the problem sets that were assigned as homework.
答
我当时就负责把那些被指定为作业的问题设备分分等级.
be in charge of 负责
grade sth.为某东西分等级
断句：
i was in charge of grading/ all the problem sets (that were assigned as homework--定语)