1. A: _____ _____ _____? 
    B: Yes, he can.
2. A: Can you see _____ _____?
    B: No. _____ _____.
    A: Can you see the apple?
    B: Yes, _____ _____.
3. A: What can you do?
    B: I can _____ _____.
4. A: What can Yan Di do?
    B: She can _____ _____, but she can't _____ _____.