可数名词单复数 — 英语词汇题
题目
根据句意和中文提示，用所给名词的适当形式填空。
1. Look! These are two ___ (baby，婴儿). They are my little cousins.
2. My grandpa has three ___ (photo，照片) of our big family.
3. There are five ___ (family，家庭) in our building. They often play together.
4. I have two ___ (knife，小刀) in my pencil box.