Rewrite these sentences:
1. Riding your bike fast is dangerous.
It is (very )dangerous for you to ride your bike fast.
2. Watching the circus on television is funny.
It is (very)funny to watch the circus on television.
3. Thu is happy. She wins the competition again.
Thu is happy because she wins the competition again.
4. She heard a sad news from her friend. She was so unhappy.
She was so unhappy because she heard a sad news from her friend.
5. Phong is anxious. He’s moving to a new school.
Phong is anxious because he's moving to a new school.