Ответ:

I. 1. River

2. Swimming

3. Sink

4. Wild

5. Animal

II. 1. We go to the river every summer.

2. Their family went for a picnic last Sunday.

3. He goes swimming every day.

4. I play football every Saturday.

5. My parents go to the theatre every month.

III. 1. Do - did

2. Wear - wore

3. See - saw