Write the possible answers. Use Present Perfect.

1. Why are you looking so happy?

2. Why are you looking so sad?

3. Why is your friend so angry?

4. Why is Ann crying?

5. Why are the students laughing? (to get a letter from home; to pass the exam; to fail the exam; to lose one's bag; to hear a funny story; to get a ticket to the Bolshoi; to hear bad news; to win the first prize; to hear good news ... )