同义句转换.

1.It is not possible to clean up the river in two days.

  _______ _______ to clean up the river in two days.

2.It is full of hope for the team to win the match.

  It _______ _______ for the team to win the match.

3.You know these papers can be used again.

  You know these papers can _______ _______.

4.We all hope that the project will be a success.

   We all hope that the project will _______ _______.

5.Drinking polluted water is not healthy.

   Drinking polluted water _______ _______.

下图为温带草原生态系统的食物网，据图回答下列问题。

图中野兔和昆虫的种间关系是（）