There are two rooms on the first floor, ____ used as a guest room.

A．the smaller of them                                 B．the smallest of them

C．the smaller of which                                D．a smaller of which

There are two rooms on the first floor, ________ is used as a guest room.

A. a small of which                                  

B. a smaller of them

C. the smaller of which

D. the smaller of them

There are two rooms on the first floor, _____ is used as a guest room .

1. A.
   a smaller of which
2. B.
   a smaller of them
3. C.
   of which the smaller
4. D.
   the smaller of them

There are two rooms on the first floor, _____ is used as a guest room .

A. a smaller of which            B. a smaller of them

C. of which the smaller           D. the smaller of them