同学你好！解析：

1.My hobby is ____collecting_(collect) stamps.

2.Summer is the ____hottest___(hot) season of the year.

3.I____went_(go) to the cinema yesterday.

4.We should keep water__clean__(clean).

5.look! the children__are playing__(play) football.

同学你好！如果对本题仍有疑义请追问，我将继续为你解答。祝你学习进步！