—When did the car accident happen?

—It happened ____ a rainy night.

　 A. at　　　　　　　　　　 B. on　　　　　　　　　 C. in

—When did the car accident happen?

      —It happened ____ a rainy night.

   A. at                     B. on                   C. in

--When did this accident happen?

--It happened ________six o'clock ________ the afternoon of last Monday.

1. A.
   at; in
2. B.
   in; on
3. C.
   about ; at
4. D.
   at; on