阅读短文，然后根据短文内容完成句子。

     Look at the picture on the blackboard. We can see a house in it. Behind the house there is a hill with

 many trees. Near the hill we can see a river. There are three boats in the river. One is blue, the other two

  are yellow. There are some Young Pioneers in those boats. Near the house we can see a big tree.

 Under the tree there is a small bus. It's a white bus. 

1. There is a _____ on the _____ .

2. _____ is the hill? It's _____ the house.

3. There are a lot of _____ on the hill.

4. Some _____ _____ are in the boats.

5. Is there a _____ _____ bus under the big tree? Yes, there is.

根据《防治海岸工程建设项目污染损害海洋环境管理条例》规定：采用暗沟或者管道方式向海域排放废水的，出水管口位置应当( )。

A．在高潮线以下 B．在高潮线以上
C．在低潮线以下
D．在低潮线以上