用所给词的适当形式填空。

1. Tom is going to be a policeman when he ________ (grow) up.

2. Everyone should have good ________ (hobby). They can make our lives more interesting.

3. She has great fun __________ (play) the violin every day.

4. She is __________ (care). She often loses her school things.

5. The Great Wall is one of ________ (great) wonders in the world.