Ответ:

1.Larry (did not swim) in the lake. He (swam) in the swimming pool.

2.My MP3 player (did not fall) in the water. It (fell) in the boat.

3 We (did not find) a dog at the weekend. We (found) a cat.

4.My friends (did not play) tennis yesterday evening. They (played) volleyball.

5.The party (took place) at my house last Saturday. It (did not take place) at Henry's house.

6 My sister (did not put) tomato sauce on her pasta yesterday. She (put) cheese on it.