She had a little rest after lunch,but she worked hard in class allday.

• (BII；P51)午饭后她休息了一会儿，单她整天都在课堂上努力学习。The other students in the class keep their eyes closed.；(BII；P31)班上的其他学生闭起眼睛。[辨析] in class 意为"在课堂上"；class前面不用冠词;in the class意为"在这个班级中"。