21.  I ________along the street looking for a place to park when the accident_______.

A. went; was occurring     B. went; occurred  

C. was going; occurred     D. was going; had occurred

22.  ----Guess what ! I came across a friend at the party last night.

---- ________. I am sure you had a wonderful time.

A. Sounds good!     B. Very well.   C. How nice !   D. All right.