He used to _________ in the sun，but now he is used to ________ at night．

A．read，read           B．reading，read         C．read，reading          D．reading，reading

（2007，蘭州，22）He used to ________ in the sun, but now he is used to ________ at night.

1. A.
   read, read
2. B.
   reading, read
3. C.
   read, reading
4. D.
   reading, reading