题目内容：

    A group of people in my city spend their spare time cleaning up the countryside. They l1. after the places where birds, insects and other animals live. Before my last birthday I was too young to join them. You have to be at least thirteen years old, and now I am.

On the first Sunday of every month we spend several hours making the countryside a good place for animals to live in and people to v2..

Sometimes the human beings are the cause of the problems. They find a pleasant spot for a picnic, but they do not take their litter home with them. The rubbish that they leave behind looks ugly and can harm the wildlife.

Nature also sometimes makes life d3. for certain animals. Last Sunday we spent all afternoon c4. overgrown plants from a river. Now the water flows freely again. The fish can swim along without anything in their way.

Some of the work we do does not have such a q5.  result. We know new trees will take several years to grow before they are big and strong enough for birds to begin nesting in their branches. But it is satisfying to know that we are doing what we can do to help.