将下列单词按要求归类。father, seven, clock, copybook, sister ,watch,
stapler, one, grandmother, camera, four, knife
1. 家庭成员：
2. 数字：
3. 学习用品：
4. 日用品：____1. father, sister, gldndmother
2. seven, one, four
3. copybook, stapler, knife
4. clock, watch, camera