We feel _______ our duty to make our school a better place.

The fire made ______ difficult to rescue the people trapped under the ruins in the earthquake.  

— In the countryside you can enjoy fresh air, blue sky and quiet surroundings.
— _______ more and more retired people are escaping from the crowded city.

"When my husband died five years ago, _____ was difficult to go from 'we' to 'me'," said Joe Kita to us.

The professor considers _____   no good without _____ understanding .   

He didn't make ____ clear when and where the meeting would be held.

I'd appreciate ________ if you would like to teach me how to use the computer.

_______ is estimated that 25 million school lunches are sold each day.

Using many symbols makes ________ to put much information on a single map.