21. It was in the hotel ____she stayed _____ I met her this morning.

A. that, that           B. that, where               C. where, that               D. where, where

22. I have never seen ____ little fish, also there are _____ few little fish that I don’t know how to meet every guest’s need.

A. so, such                B. such , so                   C. such ,such                D. so ,so

23. --- Have you seen Li Ming recently?

   --- Yes, in fact I saw him last night.  I ______him for a long time.

A. haven’t seen          B. didn’t see                 C. hadn’t seen               D. don’t see