选择适当的介词填空，每词只能用一次。on over behind in unde
题型：填空题
问题：
| 选择适当的介词填空，每词只能用一次。 | |
2. There is a pair of sneakers _____________ the bed. 3. The trash bin is _____________ the door. 4. The bridge is _____________ the river. 5. There are many fish _____________ the river. |