阅读短文，选择合适的选项。
A: Hi, Dad!
B: Hi, Jenny! Where is Lynn?
A: She is still at school. She cut her knee.
B: Oh, no! Poor Lynn! Is she okay?
A: Relax! Dad! Lynn is okay. It is only a little cut.
1. ____________ is still at school.
A. Lynn
B. Jenny
C. Danny
2. Lynn cut her ____________.
A. finger
B. toe
C. knee
3. It is only a ____________ cut.
A. big
B. little
C. short
4. Lynn ____________ okay.
A. is
B. am
C. isn't
时，两侧磨牙各一点接触。处理办法是（）