句型Where is...? It's in/on/under... — 英语词汇题
题目
根据提示补全句子，写出完整单词。A ball is in the box. A book is on the desk. A cat is under the chair.
1. Where is the ball? It's i__ the box.（在……里面）
2. Where is the book? It's o__ the desk.（在……上面）
3. Where is the cat? It's u__ the chair.（在……下面）