根据中文提示，用所给词组的适当形式填空，每空一词。

1. Look! Some kids are _________ _________ (放风筝) on the beach.

2. Mrs. Brown is always _________ _________ (对……严格要求) her child in the study.

3. Nowadays, more and more people like going to work _________ _________ (步行).

4. Let's remember our friendship and keep our dreams alive _________ _________ (永远).

5. On National Day, _________ _________ (成千上万)

    people go to Tian'anmen Square and watch the national flag go up.