I’d appreciate _______ if you would teach me how to use the computer.

All of the doctors have worked for a long time, but ________ of them stop to have a rest.

One of the most important questions they had to consider was _____ of public health. 

There are four bedrooms, ______ with its own bathroom. 

The field research will take Joan and Paul about five months; it will be a long time _________ we meet them again.