21．For a long time, they walked without saying word. Jim was the first to break silence.
A. the, a B. a, / C. a, the D. the./
22. This is such a well-known City everyone wants to visit we can find it in the map of the world.
A. that, that B. as, that C. that, as D. as, as
23. Do you know John is getting on well with his studies?
A. how B. what C. which D. that
