They are cleaning the room when we arrived.
> The room ....... is being cleaned when we arrived 
People think that the man was killed by the thief.
> The man ...... is being cleaned when we arrived 
The woman was too tired to walk home from the station.
- The woman was not .........not good enough to walk home from the station 
. The room is too small for 35 students to study in.
It is ......such a small room that 35 students can't study in it