聽下面一段對話,回答1-2題。
1. What's wrong with David?
A. He has no time to play computer games.
B. He can't understand his mother.
C. He has problems with his Math homework.
2. Why does he have such a problem?
A. Because his teacher is not good at all.
B. Because he spends too much time on computer games.
C. Because he doesn't like Math at all.