Three-fourths of the buildings ______.
----Would you mind if I turned off the air conditioner?----______. It makes no difference to me.
If ______ in wet sand, the vegetables can ______ fresh for a long time.
There is no such place ______ you dream of in this world.
----When can we go to visit you?---- Anytime you feel like ______.
The trouble with such resources as coal, oil and gas ______ that they are not renewable.