问题
填空题
写出下列词的复数形式。
1. clock _____
2. sister _____
3. parent _____
4. grandparent _____
5. he/she _____
6. box _____
7. friend _____
答案
1. clocks; 2. sisters; 3. parents; 4. grandparents; 5. they; 6. boxes; 7. friends