---“I can't find my bike. Do you know?”   

---“_________.”

1. A.
   Sorry, I'm not
2. B.
   No, I don't
3. C.
   Yes, I can
4. D.
   No, I can't.

—“I can't find my bike. Do you know?”

—_________.

[　　]

—“I can't find my bike. Do you know?”

—_________.

[　　]

— Alice, I can’t find my bike.
— Don’t worry. I saw ______ black one under the tree. Is it yours?

— Alice, I can’t find my bike.

— Don’t worry. I saw ______ black one under the tree. Is it yours?

A．a                B．an               C．the              D．不填