The boy is only five years old, but he is quite used          the telephone.

   A. to answer     B. to answering     C. of answering    D. by answering

The boy is only five years old, but he is quite used _______ the telephone.　　　　　　

A. to answer　 　　 B. to answering　　 C. of answering　 　　　 D. by answering

The boy is only five years old，but he is quite used _____ the telephone．

A．to answer     B．to answering      C．of answering      D．by answering

The boy is only five years old，but he is quite used _____ the telephone．

1. A.
   to answer
2. B.
   to answering
3. C.
   of answering
4. D.
   by answering