1. Those poor children need somewhere             ______ (live).
2. You should protect the children from ______ (catch) cold.  
3. How long does it take you               ______ (walk) 50 meters?
4. That easy chair takes up too much ______ (room).
5. Something serious is ______ (happen) to me.

1. His left knee was hurt in a t_______ accident.
2. I am a hundred p_______ in agreement with you.
3. I have an a_______ with my doctor this afternoon.
3. The number of population _______ (increasing) quickly.
5. The population of this city _______ (be) not large.
6. Those poor children need somewhere _______ (live).
7. You should protect the children from _______ (catch) cold.  
8. How long does it take you _______ (walk) 50 meters?
9. That easy chair takes up too much _______ (room).